25692
2012
deu
lecture
0
--
--
--
Laser-induced periodic surface structures produced by double femtosecond pulse irradiation sequences
European Materials Research Society (EMRS) Spring Meeting 2012, Symposium V "Laser materials processing for micro and nano applications"
28418
European Materials Research Society (EMRS) Spring Meeting 2012, Symposium V "Laser materials processing for micro and nano applications"
Strasbourg, France
2012-05-12
2012-05-18
0
S. Höhm
Weder Datei noch physisches Exemplar vorhanden ("No Access")
Präsentation
26198
2012
eng
042006-1
042006-7
4
24
article
Laser Institute of America
Orlando, Fla., USA
1
--
--
--
Femtosecond laser-induced periodic surface structures
The formation of laser-induced periodic surface structures (LIPSS) in different materials (metals, semiconductors, and dielectrics) upon irradiation with linearly polarized fs-laser pulses (τ~30–150 fs, λ~800 nm) in air environment is studied experimentally and theoretically. In metals, predominantly low-spatial-frequency-LIPSS with periods close to the laser wavelength λ are observed perpendicular to the polarization. Under specific irradiation conditions, high-spatial-frequency-LIPSS with sub-100-nm spatial periods (~λ/10) can be generated. For semiconductors, the impact of transient changes of the optical properties to the LIPSS periods is analyzed theoretically and experimentally. In dielectrics, the importance of transient excitation stages in the LIPSS formation is demonstrated experimentally using (multiple) double-fs-laser-pulse irradiation sequences. A characteristic decrease of the LIPSS periods is observed for double-pulse delays of less than 2 ps.
Journal of laser applications
28945
10.2351/1.4712658
1042-346X
1938-1387
02.08.2012
Jörn Bonse
Jörg Krüger
S. Höhm
A. Rosenfeld
eng
uncontrolled
Laser-induced periodic surface structures (LIPSS)
eng
uncontrolled
Femtosecond laser ablation
eng
uncontrolled
Ultrafast optical techniques
eng
uncontrolled
Silicon
eng
uncontrolled
Titanium
eng
uncontrolled
Silica
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
26201
2012
eng
014901-1 - 014901-9
1
112
article
American Institute of Physics
Melville, NY
1
--
--
--
Femtosecond laser-induced periodic surface structures on silica
The formation of laser-induced periodic surface structures (LIPSS) on two different silica polymorphs (single-crystalline synthetic quartz and commercial fused silica glass) upon irradiation in air with multiple linearly polarized single- and double-fs-laser pulse sequences (τ = 150 fs pulse duration, λ = 800nm center wavelength, temporal pulse separation Δt < 40 ps) is studied experimentally and theoretically. Two distinct types of fs-LIPSS [so-called low-spatial-frequency LIPSS (LSFL) and high-spatial-frequency LIPSS (HSFL)] with different spatial periods and orientations were identified. Their appearance was characterized with respect to the experimental parameters peak laser fluence and number of laser pulses per spot. Additionally, the 'dynamics' of the LIPSS formation was addressed in complementary double-fs-pulse experiments with varying delays, revealing a characteristic change of the LSFL periods. The experimental results are interpreted on the basis of a Sipe-Drude model considering the carrier dependence of the optical properties of fs-laser excited silica. This new approach provides an explanation of the LSFL orientation parallel to the laser beam polarisation in silica—as opposed to the behaviour of most other materials.
Journal of applied physics
28948
10.1063/1.4730902
0021-8979
1089-7550
Sonderstandort: Publica-Schrank
02.08.2012
S. Höhm
A. Rosenfeld
Jörg Krüger
Jörn Bonse
eng
uncontrolled
High-speed optical techniques
eng
uncontrolled
Laser beam effects
eng
uncontrolled
Refractive index
eng
uncontrolled
Silicon compounds
eng
uncontrolled
Surface structure
Verlagsliteratur
Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
28601
2013
eng
7
12
278
article
North-Holland
Amsterdam
1
--
--
--
Area dependence of femtosecond laser-induced periodic surface structures for varying band gap materials after double pulse excitation
The formation of laser-induced periodic surface structures upon irradiation of titanium, silicon, and fused silica with multiple irradiation sequences consisting of parallel polarized Ti:sapphire femtosecond laser pulse pairs (pulse duration 50–150 fs, central wavelength ~800 nm) is studied experimentally. The temporal delay between the individual near-equal energy fs-laser pulses was varied between 0 and 5 ps with a temporal resolution of better than 0.2 ps. The surface morphology of the irradiated surface areas is characterized by means of scanning electron microscopy (SEM). In all materials a decrease of the rippled surface area is observed for increasing delays. The characteristic delay decay scale is quantified and related to material dependent excitation and energy relaxation processes.
Applied surface science
31465
10.1016/j.apsusc.2012.10.188
0169-4332
1873-5584
03.06.2013
S. Höhm
A. Rosenfeld
Jörg Krüger
Jörn Bonse
eng
uncontrolled
Laser-induced periodic surface structures (LIPSS)
eng
uncontrolled
Femtosecond laser ablation
eng
uncontrolled
Double-pulse experiments
eng
uncontrolled
Ultrafast optical techniques
eng
uncontrolled
Mach-Zehnder interferometer
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
27646
2013
eng
054102-1
054102-4
5
102
article
American Institute of Physics
Melville, NY
1
--
--
--
Femtosecond diffraction dynamics of laser-induced periodic surface structures on fused silica
The formation of laser-induced periodic surface structures (LIPSS) on fused silica upon irradiation with linearly polarized fs-laser pulses (50 fs pulse duration, 800?nm center wavelength) is studied experimentally using a transillumination femtosecond time-resolved (0.1 ps-1 ns) pump-probe diffraction approach. This allows to reveal the generation dynamics of near-wavelength-sized LIPSS showing a transient diffraction at specific spatial frequencies even before a corresponding permanent surface relief was observed. The results confirm that the ultrafast energy deposition to the materials surface plays a key role and triggers subsequent physical mechanisms such as carrier scattering into self-trapped excitons.
Applied physics letters
30475
10.1063/1.4790284
0003-6951
1077-3118
05.02.2013
S. Höhm
A. Rosenfeld
Jörg Krüger
Jörn Bonse
eng
uncontrolled
High-speed optical techniques
eng
uncontrolled
Laser beam effects
eng
uncontrolled
Silicon compounds
eng
uncontrolled
Surface structure
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
26226
2012
eng
9233
9236
23
258
article
North-Holland
Amsterdam
1
--
--
--
Formation of laser-induced periodic surface structures on fused silica upon multiple parallel polarized double-femtosecond-laser-pulse irradiation sequences
The formation of laser-induced periodic surface structures (LIPSS) upon irradiation of fused silica with multiple irradiation sequences of parallel polarized Ti:sapphire femtosecond laser pulse pairs (160 fs pulse duration, 800 nm central wavelength) was studied experimentally. For that purpose, a Michelson interferometer was used to generate near-equal-energy double-pulse sequences allowing the temporal pulse delay between the parallel-polarized individual fs-laser pulses to be varied between 0 and 40 ps with ~0.2 ps temporal resolution. The surface morphologies of the irradiated surface areas were characterized by means of scanning electron and scanning force microscopy. In the sub-ps delay range a strong decrease of the LIPSS periods and the ablation crater depths with the double-pulse delay was observed indicating the importance of the laser-induced free-electron plasma in the conduction band of the solids for the formation of LIPSS.
Applied surface science
28976
10.1016/j.apsusc.2011.09.076
0169-4332
1873-5584
Sonderstandort: Publica-Schrank
02.08.2012
A. Rosenfeld
M. Rohloff
S. Höhm
Jörg Krüger
Jörn Bonse
eng
uncontrolled
Laser-induced periodic surface structures (LIPSS)
eng
uncontrolled
Femtosecond laser ablation
eng
uncontrolled
Double-pulse experiments
eng
uncontrolled
Fused silica
eng
uncontrolled
Michelson interferometer
Verlagsliteratur
Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
27787
2013
eng
553
557
3
110
article
Springer
Berlin
1
--
--
--
Dynamics of the formation of laser-induced periodic surface structures on dielectrics and semiconductors upon femtosecond laser pulse irradiation sequences
The formation of laser-induced periodic surface structures (LIPSS) upon irradiation of fused silica and silicon with multiple (NDPS) irradiation sequences consisting of linearly polarized femtosecond laser pulse pairs (pulse duration ~150 fs, central wavelength ~800 nm) is studied experimentally. Nearly equal-energy double-pulse sequences are generated allowing the temporal pulse delay Δt between the cross-polarized individual fs-laser pulses to be varied from -40 ps to +40 ps with a resolution of ~0.2 ps. The surface morphologies of the irradiated surface areas are characterized by means of scanning electron and scanning force microscopy. Particularly for dielectrics in the sub-ps delay range striking differences in the orientation and spatial characteristics of the LIPSS can be observed. For fused silica, a significant decrease of the LIPSS spatial periods from ~790 nm towards ~550 nm is demonstrated for delay changes of less than ~2 ps. In contrast, for silicon under similar irradiation conditions, the LIPSS periods remain constant (~760 nm) for delays up to 40 ps. The results prove the impact of laser-induced electrons in the conduction band of the solid and associated transient changes of the optical properties on fs-LIPSS formation.
Applied physics A
30622
10.1007/s00339-012-7184-z
0947-8396
04.03.2013
S. Höhm
M. Rohloff
A. Rosenfeld
Jörg Krüger
Jörn Bonse
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
27788
2013
eng
547
551
3
110
article
Springer
Berlin
1
--
--
--
Sub-100-nm laser-induced periodic surface structures upon irradiation of titanium by Ti:sapphire femtosecond laser pulses in air
The formation of laser-induced periodic surface structures (LIPSS) on titanium upon irradiation with linearly polarized femtosecond (fs) laser pulses (τ = 30 fs, λ = 790 nm) in an air environment is studied experimentally and theoretically. In the experiments, the dependence on the laser fluence and the number of laser pulses per irradiation spot has been analyzed. For a moderate number of laser pulses (N < 1000) and at fluences between ~0.09 and ~0.35 J/cm², predominantly low-spatial-frequency-LIPSS with periods between 400 nm and 800 nm are observed perpendicular to the polarization. In a narrow fluence range between 0.05 and 0.09 J/cm², high-spatial-frequency-LIPSS with sub-100-nm spatial periods (~λ/10) can be generated with an orientation parallel to the polarization (N = 50). These experimental results are complemented by calculations based on a theoretical LIPSS model and compared to the present literature.
Applied physics A
30623
10.1007/s00339-012-7140-y
0947-8396
Sonderstandort: Publica-Schrank
04.03.2013
Jörn Bonse
S. Höhm
A. Rosenfeld
Jörg Krüger
Verlagsliteratur
Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
28953
2013
deu
lecture
0
--
--
--
Time-resolved diffraction during the formation of femtosecond laser-induced periodic surface structures on dielectrics
LAMP 2013, The 6th International Congress on Laser Advanced Materials Processing
31850
LAMP 2013, The 6th International Congress on Laser Advanced Materials Processing
Niigata, Japan
2013-07-23
2013-07-26
0
S. Höhm
Weder Datei noch physisches Exemplar vorhanden ("No Access")
Präsentation
29556
2013
deu
poster
0
--
--
--
Femtosecond time-resolved diffraction dynamics of laser-induced periodic surface structures on dielectrics
12th Conference on Laser Ablation, COLA 2013
32482
12th Conference on Laser Ablation, COLA 2013
Ischia, Italy
2013-10-06
2013-10-11
S. Höhm
Weder Datei noch physisches Exemplar vorhanden ("No Access")
Präsentation
29650
2013
eng
29643
29655
24
21
article
Optical Society of America
Washington, DC
1
--
--
--
Rippled area formed by surface plasmon polaritons upon femtosecond laser double-pulse irradiation of silicon
The formation of near-wavelength laser-induced periodic surface structures (LIPSS) on silicon upon irradiation with sequences of Ti:sapphire femtosecond laser pulse pairs (pulse duration 150 fs, central wavelength 800 nm) is studied theoretically. For this purpose, the nonlinear generation of conduction band electrons in silicon and their relaxation is numerically calculated using a two-temperature model approach including intrapulse changes of optical properties, transport, diffusion and recombination effects. Following the idea that surface plasmon polaritons (SPP) can be excited when the material turns from semiconducting to metallic state, the 'SPP active area' is calculated as function of fluence and double-pulse delay up to several picoseconds and compared to the experimentally observed rippled surface areas. Evidence is presented that multi-photon absorption explains the large increase of the rippled area for temporally overlapping pulses. For longer double-pulse delays, relevant relaxation processes are identified. The results demonstrate that femtosecond LIPSS on silicon are caused by the excitation of SPP and can be controlled by temporal pulse shaping.
Optics express
32579
10.1364/OE.21.029643
1094-4087
28.11.2013
Thibault Derrien
Jörg Krüger
T.E. Itina
S. Höhm
A. Rosenfeld
Jörn Bonse
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
27164
2012
deu
lecture
0
--
--
--
Formation of laser-induced periodic surface strctures upon irradiation of metals (Ti), semiconductors (Si), and dieelectrics (SiO2) with double femtosecond pulse sequences
2nd International Workshop on Laser-induced Periodic Surface Structures
29957
2nd International Workshop on Laser-induced Periodic Surface Structures
Cottbus, Germany
2012-10-04
0
S. Höhm
Weder Datei noch physisches Exemplar vorhanden ("No Access")
Präsentation
29812
2013
eng
254101-1
254101-4
25
103
article
American Institute of Physics
Melville, NY
1
--
--
--
Formation of laser-induced periodic surface structures on fused silica upon two-color double-pulse irradiation
The formation of laser-induced periodic surface structures (LIPSS) upon irradiation of fused silica with multiple irradiation sequences consisting of laser pulse pairs (50 fs single-pulse duration) of two different wavelengths (400 and 800 nm) is studied experimentally. Parallel polarized double-pulse sequences with a variable delay Δt between -10 and +10 ps and between the individual fs-laser pulses were used to investigate the LIPSS periods versus Δt. These two-color experiments reveal the importance of the ultrafast energy deposition to the silica surface by the first laser pulse for LIPSS formation. The second laser pulse subsequently reinforces the previously seeded spatial LIPSS frequencies.
Applied physics letters
32746
10.1063/1.4850528
0003-6951
1077-3118
03.01.2014
S. Höhm
M. Herzlieb
A. Rosenfeld
Jörg Krüger
Jörn Bonse
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
30169
2013
deu
lecture
0
--
--
--
Femtosecond-time resolved studies of LIPSS formation on dielectrics
International workshop on laser-induced periodic surface structures
33128
International workshop on laser-induced periodic surface structures
Berlin, Germany
2013-11-07
0
S. Höhm
Weder Datei noch physisches Exemplar vorhanden ("No Access")
Präsentation
37072
2016
eng
STh1Q.3, 1
2
conferenceobject
Optical Society of America
Optical Society of America
0
--
--
--
Laser-induced periodic surface structures (LIPSS) - A scientific evergreen
The current state in the field of laser-induced periodic surface structures (LIPSS, ripples) is reviewed. Their formation mechanisms are analyzed in ultrafast experiments (time-resolved diffraction and polarization controlled double-pulse experiments) and technological applications are demonstrated.
OSA Technical Digest (2016)
978-1-943580-11-8
10.1364/CLEO_SI.2016.STh1Q.3
Conference on Lasers and Electro-Optics (CLEO) - Science and Innovations 2016
San Jose, CA, USA
05.06.2016
10.06.2016
Jörn Bonse
S. Höhm
Sabrina Kirner
A. Rosenfeld
Jörg Krüger
eng
uncontrolled
Laser materials processing
eng
uncontrolled
Optics at surfaces
eng
uncontrolled
Ultrafast phenomena
eng
uncontrolled
Laser-induced periodic surface strcutures (LIPSS)
eng
uncontrolled
Femtosecond laser ablation
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
31209
2014
eng
074902-1
074902-8
7
116
article
American Institute of Physics
Melville, NY
1
--
--
--
Plasmonic formation mechanism of periodic 100-nm-structures upon femtosecond laser irradiation of silicon in water
The formation of laser-induced periodic surface structures (LIPSS) upon irradiation of silicon by multiple (N = 100) linearly polarized Ti:sapphire femtosecond laser pulses (duration τ = 30 fs, center wavelength λ0 ~ 790 nm) is studied experimentally in air and water environment. The LIPSS surface morphologies are characterized by scanning electron microscopy and their spatial periods are quantified by two-dimensional Fourier analyses. It is demonstrated that the irradiation environment significantly influences the periodicity of the LIPSS. In air, so-called low-spatial frequency LIPSS (LSFL) were found with periods somewhat smaller than the laser wavelength (ΛLSFL ~ 0.7 × λ0) and an orientation perpendicular to the laser polarization. In contrast, for laser processing in water a reduced ablation threshold and LIPSS with approximately five times smaller periods ΛLIPSS ~ 0.15 × λ0 were observed in the same direction as in air. The results are discussed within the frame of recent LIPSS theories and complemented by a thin film based surface plasmon polariton model, which successfully describes the tremendously reduced LIPSS periods in water.
Journal of applied physics
34208
10.1063/1.4887808
0021-8979
1089-7550
21.08.2014
Thibault Derrien
Robert Koter
Jörg Krüger
S. Höhm
A. Rosenfeld
Jörn Bonse
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
30595
2014
deu
poster
0
--
--
--
Double-fs-pulse generated LIPSS on silicon explained by Surface Plasmon Polaritons
15th International Symposium on Laser Precision Microfabrication LPM 2014
33570
15th International Symposium on Laser Precision Microfabrication LPM 2014
Vilnius, Lithuania
2014-06-17
2014-06-20
S. Höhm
Weder Datei noch physisches Exemplar vorhanden ("No Access")
Präsentation
30597
2014
deu
lecture
0
--
--
--
Time-resolved two-color experiments studying the dynamics of femtosecond laser-induced periodic surface structures on dielectrics
15th International Symposium on Laser Precision Microfabrication LPM 2014
33572
15th International Symposium on Laser Precision Microfabrication LPM 2014
Vilnius, Lithuania
2014-06-17
2014-06-20
0
S. Höhm
Weder Datei noch physisches Exemplar vorhanden ("No Access")
Präsentation
31450
2014
eng
103
110
1
117
article
Springer
Berlin
1
--
--
--
Femtosecond laser-induced periodic surface structures on steel and titanium alloy for tribological applications
Laser-induced periodic surface structures (LIPSS, ripples) were generated on stainless steel (100Cr6) and titanium alloy (Ti6Al4V) surfaces upon irradiation with multiple femtosecond laser pulses (pulse duration 30 fs, central wavelength 790 nm). The experimental conditions (laser fluence, spatial spot overlap) were optimized in a sample-scanning geometry for the processing of large surface areas (5 × 5 mm²) covered homogeneously by the nanostructures. The irradiated surface regions were subjected to white light interference microscopy and scanning electron microscopy revealing spatial periods around 600 nm. The tribological performance of the nanostructured surface was characterized by reciprocal sliding against a ball of hardened steel in paraffin oil and in commercial engine oil as lubricants, followed by subsequent inspection of the wear tracks. For specific conditions, on the titanium alloy a significant reduction of the friction coefficient by a factor of more than two was observed on the laser-irradiated (LIPSS-covered) surface when compared to the non-irradiated one, indicating the potential benefit of laser surface structuring for tribological applications.
Applied physics A
34471
10.1007/s00339-014-8229-2
0947-8396
25.09.2014
Jörn Bonse
Robert Koter
Manfred Hartelt
Dirk Spaltmann
Simone Pentzien
S. Höhm
A. Rosenfeld
Jörg Krüger
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
31451
2014
eng
77
81
1
117
article
Springer
Berlin
1
--
--
--
Rippled area formed by surface plasmon polaritons upon femtosecond laser double-pulse irradiation of silicon: the role of carrier generation and relaxation processes
The formation of laser-induced periodic surface structures (LIPSS, ripples) upon irradiation of silicon with multiple irradiation sequences consisting of femtosecond laser pulse pairs (pulse duration 150 fs, central wavelength 800 nm) is studied numerically using a rate equation system along with a two-temperature model accounting for one- and two-photon absorption and subsequent carrier diffusion and Auger recombination processes. The temporal delay between the individual equal-energy fs-laser pulses was varied between 0 and ~4 ps for quantification of the transient carrier densities in the conduction band of the laser-excited silicon. The results of the numerical analysis reveal the importance of carrier generation and relaxation processes in fs-LIPSS formation on silicon and quantitatively explain the two time constants of the delay-dependent decrease of the low spatial frequency LIPSS (LSFL) area observed experimentally. The role of carrier generation, diffusion and recombination is quantified individually.
Applied physics A
34472
10.1007/s00339-013-8205-2
0947-8396
25.09.2014
Thibault Derrien
Jörg Krüger
T.E. Itina
S. Höhm
A. Rosenfeld
Jörn Bonse
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
24049
2011
eng
014910-1 - 014910-4
1
110
article
American Institute of Physics
Melville, NY
1
--
--
--
Formation of laser-induced periodic surface structures on fused silica upon multiple cross-polarized double-femtosecond-laser-pulse irradiation sequences
The formation of laser-induced periodic surface structures (LIPSS) upon irradiation of fused silica with multiple irradiation sequences consisting of five Ti:sapphire femtosecond (fs) laser pulse pairs (150 fs, 800 nm) is studied experimentally. A Michelson interferometer is used to generate near-equal-energy double-pulse sequences with a temporal pulse delay from -20 to +20 ps between the cross-polarized individual fs-laser pulses (~0.2 ps resolution). The results of multiple double-pulse irradiation sequences are characterized by means of Scanning Electron and Scanning Force Microscopy. Specifically in the sub-ps delay domain striking differences in the surface morphologies can be observed, indicating the importance of the laser-induced free-electron plasma in the conduction band of the solids for the formation of LIPSS.
Journal of applied physics
26673
10.1063/1.3605513
0021-8979
1089-7550
14.07.2011
M. Rohloff
S.K. Das
S. Höhm
R. Grunwald
A. Rosenfeld
Jörg Krüger
Jörn Bonse
eng
uncontrolled
Atomic force microscopy
eng
uncontrolled
Conduction bands
eng
uncontrolled
High-speed optical techniques
eng
uncontrolled
Laser beam effects
eng
uncontrolled
Scanning electron microscopy
eng
uncontrolled
Silicon compounds
eng
uncontrolled
Surface morphology
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
24193
2011
deu
poster
0
--
--
--
Dynamics of the formation of laser-induced periodic surface structures on dielectrics and semiconductors upon femtosecond laser pulse irradiation sequences
11th International Conference on Laser Ablation (COLA 2011)
26824
11th International Conference on Laser Ablation (COLA 2011)
Playa del Carmen, Mexico
2011-11-13
2011-11-19
S. Höhm
Weder Datei noch physisches Exemplar vorhanden ("No Access")
Präsentation
32860
2015
eng
39
42
336
article
North-Holland
Amsterdam
1
--
--
--
Laser-induced periodic surface structures on fused silica upon cross-polarized two-color double-fs-pulse irradiation
The dynamics of the formation of laser-induced periodic surface structures (LIPSS) on fused silica upon irradiation with linearly polarized fs-laser pulses (50 fs pulse duration) is studied by cross-polarized two-color double-fs-pulse experiments. In order to analyze the relevance of temporally distributed energy deposition in the early stage of LIPSS formation, a Mach-Zehnder interferometer was used for generating multiple double-pulse sequences at two different wavelengths (400 and 800 nm). The inter-pulse delay between the individual cross-polarized pulses of each sequence was systematically varied in the sub-ps range and the resulting LIPSS morphologies were characterized by scanning electron microscopy. It is found that the polarization of the first laser pulse arriving to the surface determines the orientation and the periodicity of the LIPSS. These two-color experiments further confirm the importance of the ultrafast energy deposition to the silica surface for LIPSS formation, particularly by the first laser pulse of each sequence. The second laser pulse subsequently reinforces the previously seeded spatial LIPSS characteristics (period, orientation).
Applied surface science
35936
10.1016/j.apsusc.2014.09.101
0169-4332
1873-5584
24.03.2015
S. Höhm
M. Herzlieb
A. Rosenfeld
Jörg Krüger
Jörn Bonse
eng
uncontrolled
Laser-induced periodic surface structures (LIPSS)
eng
uncontrolled
Femtosecond laser ablation
eng
uncontrolled
Double-pulse experiments
eng
uncontrolled
Ultrafast optical techniques
eng
uncontrolled
Mach-Zehnder interferometer
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
32861
2015
eng
21
27
336
article
North-Holland
Amsterdam
1
--
--
--
Tribological performance of femtosecond laser-induced periodic surface structures on titanium and a high toughness bearing steel
Laser-induced periodic surface structures (LIPSS, ripples) were processed on steel (X30CrMoN15-1) and titanium (Ti) surfaces by irradiation in air with linear polarized femtosecond laser pulses with a pulse duration of 30 fs at 790 nm wavelength. For the processing of large LIPSS covered surface areas (5 mm × 5 mm), the laser fluence and the spatial spot overlap were optimized in a sample-scanning geometry. The laser-processed surfaces were characterized by optical microscopy (OM), white light interference microscopy (WLIM) and scanning electron microscopy (SEM). Spatial LIPSS periods between 450 and 600 nm were determined. The nanostructured surface regions were tribologically tested under reciprocal sliding conditions against a 10-mm diameter ball of hardened 100Cr6 steel. Paraffin oil and engine oil were used as lubricants for 1000 sliding cycles at 1 Hz with a normal load of 1.0 N. The corresponding wear tracks were analyzed by OM and SEM. In particular cases, the laser-generated nanostructures endured the tribological treatment. Simultaneously, a significant reduction of the friction coefficient and the wear was observed in the laser-irradiated (LIPSS-covered) areas when compared to the non-irradiated surface. The experiments reveal the potential benefit of laser surface structuring for tribological applications.
Applied surface science
35937
10.1016/j.apsusc.2014.08.111
0169-4332
1873-5584
24.03.2015
Jörn Bonse
Robert Koter
Manfred Hartelt
Dirk Spaltmann
Simone Pentzien
S. Höhm
A. Rosenfeld
Jörg Krüger
eng
uncontrolled
Laser-induced periodic surface structures (LIPSS)
eng
uncontrolled
Femtosecond laser processing
eng
uncontrolled
Tribology
eng
uncontrolled
Metals
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
34354
2015
eng
25959
25971
20
23
article
Optical Society of America
Washington, DC
1
--
--
--
Laser-induced periodic surface structures on titanium upon single- and two-color femtosecond double-pulse irradiation
Single- and two-color double-fs-pulse experiments were performed on titanium to study the dynamics of the formation of laser-induced periodic surface structures (LIPSS). A Mach-Zehnder inter-ferometer generated polarization controlled (parallel or cross-polarized) double-pulse sequences in two configurations – either at 800 nm only, or at 400 and 800 nm wavelengths. The inter-pulse delays of the individual 50-fs pulses ranged up to some tens of picoseconds. Multiple of these single- or two-color double-fs-pulse sequences were collinearly focused by a spherical mirror to the sample surface. In both experimental configurations, the peak fluence of each individual pulse was kept below its respective ablation threshold and only the joint action of both pulses lead to the formation of LIPSS. Their resulting characteristics were analyzed by scanning electron microscopy and the periods were quantified by Fourier analyses. The LIPSS periods along with the orientation allow a clear identification of the pulse which dominates the energy coupling to the material. A plasmonic model successfully explains the delay-dependence of the LIPSS on titanium and confirms the importance of the ultrafast energy deposition stage for LIPSS formation.
Optics express
37485
10.1364/OE.23.025959
1094-4087
05.10.2015
S. Höhm
A. Rosenfeld
Jörg Krüger
Jörn Bonse
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
33264
2015
eng
Chapter 7, 141
156
bookpart
De Gruyter
0
--
--
--
Femtosecond laser-induced surface nanostructures for tribological applications
Laser-induced periodic surface structures (LIPSS) were generated on two types of steel (100Cr6, X30CrMoN15-1) and two types of titanium (Ti, Ti6A14V) surfaces upon irradiation with multiple linear polarized femtosecond laser pulses in air environment (pulse duration 30 fs, central wavelength 790 nm, pulse repetition rate 1 kHz, Gaussian beam shape). Teh conditions (laser fluence, spatial spot overlap) were optimized in a sample-scanning geometry for the processing of large surface areas covered homogeneously by two different types of LIPSS - either near wavelength or sub-100 nm structures. The tribological performance of the nanostructured surfaces was characterized under reciprocating sliding at 1 Hz against a ball of hardened steel using different lubricants and normal forces. After 1000 cycles the corresponding wear tracks were characterized by optical and scanning electron microscopy. For specific conditions, the wear was strongly reduced and laser-generated nanostructures endured the tribological treatment. Simultaneously, a significant reduction of the friction coefficient was observed in the laser-irradiated LIPSS-covered areas, indicating the benefit of laser surface structuring for tribological applications. The spatially Gaussian shaped beam used for the laser processing was transformed via beam shaping into a top hat distribution at the surface of the samples for optimization. The tribological performance of the laser-induced nanostructures is discussed on the basis of different physical and chemical mechanisms.
Optically induced nanostructures: Biomedical and technical applications
36353
978-3-11-033718-1
978-3-11-035432-4
10.1515/9783110354324-011
urn:nbn:de:kobv:b43-332647
Creative Commons - Namensnennung
Jörn Bonse
S. Höhm
Manfred Hartelt
Dirk Spaltmann
Simone Pentzien
Robert Koter
S. Marschner
A. Rosenfeld
Jörg Krüger
Verlagsliteratur
Datei für die Öffentlichkeit verfügbar ("Open Access")
Bundesanstalt für Materialforschung und -prüfung (BAM)
https://opus4.kobv.de/opus4-bam/files/33264/Femtosecond laser-induced surface nanostructures for tribological applications.pdf
32405
2015
eng
61
71
1
23
article
Optical Society of America
Washington, DC
1
--
--
--
Femtosecond laser-induced periodic surface structures on silicon upon polarization controlled two-color double-pulse irradiation
Two-color double-fs-pulse experiments were performed on silicon wafers to study the temporally distributed energy deposition in the formation of laser-induced periodic surface structures (LIPSS). A Mach-Zehnder interferometer generated parallel or cross-polarized double-pulse sequences at 400 and 800 nm wavelength, with inter-pulse delays up to a few picoseconds between the sub-ablation 50-fs-pulses. Multiple two-color double-pulse sequences were collinearly focused by a spherical mirror to the sample. The resulting LIPSS characteristics (periods, areas) were analyzed by scanning electron microscopy. A wavelength-dependent plasmonic mechanism is proposed to explain the delay-dependence of the LIPSS. These two-color experiments extend previous single-color studies and prove the importance of the ultrafast energy deposition for LIPSS formation.
Optics express
35471
10.1364/OE.23.000061
1094-4087
15.01.2015
S. Höhm
M. Herzlieb
A. Rosenfeld
Jörg Krüger
Jörn Bonse
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
32541
2015
eng
Chapter 5, 85
99
bookpart
Springer
0
--
--
--
Formation of laser-induced periodic surface structures (LIPSS) on dielectrics and semiconductors upon double-femtosecond laser pulse irradiation sequences
The formation of laser-induced periodic surface structures (LIPSS) on different materials (silicon, fused silica, quartz) with linearly polarized fs-laser irradiation is studied experimentally. In dielectrics, the importance of transient excitation stages in the LIPSS formation is demonstrated by using (multiple) cross-polarized double-fs-laser-pulse irradiation sequences. A characteristic decrease of the spatial LIPSS periods is observed for double-pulse delays of less than 2 ps along with a characteristic 90°-rotation of the LIPSS orientation.
Progress in nonlinear nano-optics
35610
978-3-319-12216-8
978-3-319-12217-5
10.1007/978-3-319-12217-5_5
2192-1970
Serientitel: Nano-Optics and Nanophotonics – Series title: Nano-Optics and Nanophotonics
S. Höhm
M. Rohloff
Jörg Krüger
Jörn Bonse
A. Rosenfeld
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
38633
2017
eng
9000615
15
3
23
article
IEEE
1
--
--
--
Laser-induced periodic surface structures — a scientific evergreen
Laser-induced periodic surface structures (LIPSS, ripples) are a universal phenomenon and can be generated on almost any material upon irradiation with linearly polarized radiation. With the availability of ultrashort laser pulses, LIPSS have gained an increasing attraction during the past decade, since these structures can be generated in a simple single-step process, which allows a surface nanostructuring for tailoring optical, mechanical, and chemical surface properties. In this study, the current state in the field of LIPSS is reviewed. Their formation mechanisms are analyzed in ultrafast time-resolved scattering, diffraction, and polarization constrained double-pulse experiments. These experiments allow us to address the question whether the LIPSS are seeded via ultrafast energy deposition mechanisms acting during the absorption of optical radiation or via self-organization after the irradiation process. Relevant control parameters of LIPSS are identified, and technological applications featuring surface functionalization in the fields of optics, fluidics, medicine, and tribology are discussed.
IEEE Journal of Selected Topics in Quantum Electronics
10.1109/JSTQE.2016.2614183
1077-260X
1558-4542
20.01.2017
Jörn Bonse
S. Höhm
Sabrina V. Kirner
A. Rosenfeld
Jörg Krüger
eng
uncontrolled
Laser ablation
eng
uncontrolled
Nanostructures
eng
uncontrolled
Surface functionalization
eng
uncontrolled
Surface texture
eng
uncontrolled
Laser-induced periodic surface structures (LIPSS)
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
39082
2017
eng
Article 034003, 1
7
3
92
article
IOP
Bristol, UK
The Royal Swedish Academy of Sciences
1
--
--
--
Laser-induced periodic surface structures on zinc oxide crystals upon two-colour femtosecond double-pulse irradiation
In order to study the temporally distributed energy deposition in the formation of laser-induced periodic surface structures (LIPSS) on single-crystalline zinc oxide (ZnO), two-colour double-fs-pulse experiments were performed. Parallel or cross-polarised double-pulse sequences at 400 and 800 nm wavelength were generated by a Mach–Zehnder interferometer, exhibiting inter-pulse delays up to a few picoseconds between the sub-ablation 50-fs-pulses. Twenty two-colour double-pulse sequences were collinearly focused by a spherical mirror to the sample surface. The resulting LIPSS periods and areas were analysed by scanning electron microscopy. The delay-dependence of these LIPSS characteristics shows a dissimilar behaviour when compared to the semiconductor silicon, the dielectric fused silica, or the metal titanium. A wavelength-dependent plasmonic mechanism is proposed to explain the delay-dependence of the LIPSS on ZnO when considering multi-photon excitation processes. Our results support the involvement of nonlinear processes for temporally overlapping pulses. These experiments extend previous two-colour studies on the indirect semiconductor silicon towards the direct wide band-gap semiconductor ZnO and further manifest the relevance of the ultrafast energy deposition for LIPSS formation.
Physica Scripta
10.1088/1402-4896/aa5578
1402-4896
0031-8949
06.11.2017
S. Höhm
A. Rosenfeld
Jörg Krüger
Jörn Bonse
eng
uncontrolled
Laser-induced periodic surface structures, LIPSS
eng
uncontrolled
Laser ablation
eng
uncontrolled
Surface plasmon polariton
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
32956
2015
deu
lecture
0
--
--
--
Two-color double-pulse experiments studying the dynamics of femtosecond laser-induced Micro- and surface structures (LIPSS) on metals, semiconductors, and dielectrics
Photonics West, SPIE Conference 9351 on Laser-based Micro- and Nanoprocessing IX
36035
Photonics West, SPIE Conference 9351 on Laser-based Micro- and Nanoprocessing IX
San Francisco, California, United States of America
2015-02-10
2015-02-12
0
S. Höhm
Weder Datei noch physisches Exemplar vorhanden ("No Access")
Präsentation
32957
2015
deu
poster
0
--
--
--
Tribological performance of near- and sub-wavelength femtosecond laser-induced periodic surface structures on titanium
Photonics West, SPIE Conference 9351 on Laser-based Micro- and Nanoprocessing IX
36036
Photonics West, SPIE Conference 9351 on Laser-based Micro- and Nanoprocessing IX
San Francisco, California, United States of America
2015-02-10
2015-02-12
S. Höhm
Weder Datei noch physisches Exemplar vorhanden ("No Access")
Präsentation
32597
2015
deu
lecture
0
--
--
--
Dynamics of the formation of laser-induced periodic surface structures (LIPSS) on dielectrics, semiconductors, and metals upon femtosecond two-color double-pulse irradiation
16th International Symposium on Laser Precision Microfabrication LPM 2015
35668
16th International Symposium on Laser Precision Microfabrication LPM 2015
Kitakyushu, Fukuoka, Japan
2015-05-26
2015-05-29
0
S. Höhm
Weder Datei noch physisches Exemplar vorhanden ("No Access")
Präsentation
35937
2016
eng
190
196
374
article
Elsevier B.V.
Amsterdam, Netherlands
1
--
--
--
Tribological performance of sub-100-nm femtosecond laser-induced periodic surface structures on titanium
Sub-100-nm laser-induced periodic surface structures (LIPSS) were processed on bulk titanium (Ti) surfaces by femtosecond laser pulse irradiation in air (30 fs pulse duration, 790 nm wavelength). The laser peak fluence, the spatial spot overlap, and the number of overscans were optimized in a sample-scanning geometry in order to obtain large surface areas (5 mm × 5 mm) covered homogeneously by the LIPSS. The laser-processed regions were characterized by optical microscopy (OM), white light interference microscopy (WLIM) and scanning electron microscopy (SEM). The friction coefficient of the nanostructured surfaces was tested during 1000 cycles under reciprocal sliding conditions (1 Hz, 1.0 N normal load) against a 10-mm diameter ball of hardened 100Cr6 steel, both in paraffin oil and in engine oil used as lubricants. Subsequently, the corresponding wear tracks were qualified by OM, SEM, and energy dispersive X-ray analyses (EDX). The results of the tribological tests are discussed and compared to that obtained for near wavelength-sized fs-LIPSS, processed under somewhat different irradiation conditions. Some constraints for a beneficial effect of LIPSS on the tribological performance are provided.
Applied Surface Science
10.1016/j.apsusc.2015.11.019
http://www.sciencedirect.com/science/article/pii/S0169433215026987
0169-4332
1873-5584
09.06.2016
Jörn Bonse
S. Höhm
Robert Koter
Manfred Hartelt
Dirk Spaltmann
Simone Pentzien
A. Rosenfeld
Jörg Krüger
eng
uncontrolled
Femtosecond laser ablation
eng
uncontrolled
Laser-induced periodic surface structures, LIPSS
eng
uncontrolled
Friction
eng
uncontrolled
Wear
eng
uncontrolled
Nanostructures
eng
uncontrolled
Surface functionalization
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
35938
2016
eng
331
338
374
article
Elsevier
Amsterdam, Netherlands
1
--
--
--
Dynamics of the formation of laser-induced periodic surface structures (LIPSS) upon femtosecond two-color double-pulse irradiation of metals, semiconductors, and dielectrics
In order to address the dynamics and physical mechanisms of LIPSS formation for three different classes of materials (metals, semiconductors, and dielectrics), two-color double-fs-pulse experiments were performed on Titanium, Silicon and Fused Silica. For that purpose a Mach–Zehnder interferometer generated polarization controlled (parallel or cross-polarized) double-pulse sequences at 400 nm and 800 nm wavelength, with inter-pulse delays up to a few picoseconds. Multiple of these two-color double-pulse sequences were collinearly focused by a spherical mirror to the sample surfaces. The fluence of each individual pulse (400 nm and 800 nm) was always kept below its respective ablation threshold and only the joint action of both pulses lead to the formation of LIPSS. Their resulting characteristics (periods, areas) were analyzed by scanning electron microscopy. The periods along with the LIPSS orientation allow a clear identification of the pulse which dominates the energy coupling to the material. For strong absorbing materials (Silicon, Titanium), a wavelength-dependent plasmonic mechanism can explain the delay-dependence of the LIPSS. In contrast, for dielectrics (Fused Silica) the first pulse always dominates the energy deposition and LIPSS orientation, supporting a non-plasmonic formation scenario. For all materials, these two-color experiments confirm the importance of the ultrafast energy deposition stage for LIPSS formation.
Applied Surface Science
10.1016/j.apsusc.2015.12.129
http://www.sciencedirect.com/science/article/pii/S0169433215031347
0169-4332
1873-5584
09.06.2016
S. Höhm
M. Herzlieb
A. Rosenfeld
Jörg Krüger
Jörn Bonse
eng
uncontrolled
Femtosecond laser ablation
eng
uncontrolled
Double-pulse experiments
eng
uncontrolled
Laser-induced periodic surface structures (LIPSS)
eng
uncontrolled
Mach-Zehnder interferometer
eng
uncontrolled
Ultrafast optical techniques
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
43594
2017
eng
1
10
bookpart
Elsevier
0
--
--
--
Dynamics of ultrashort double-pulse laser ablation of solid surfaces
Given their unique properties, ultrashort laser pulses with durations in the femtosecond to picosecond range currently open new avenues in the field of laser materials processing, resulting in groundbreaking new applications based on laser-induced surface functionalization. This article reviews the usability of temporally distributed energy deposition via double-pulse irradiation in applications based on laser ablation. This includes simple new techniques for surface nanostructuring and improved sensitivities in spectroscopic material analyses.
Reference Module in Chemistry, Molecular Sciences and Chemical Engineering, Encyclopedia of Interfacial Chemistry: Surface Science and Electrochemistry
978-0-12-409547-2
10.1016/B978-0-12-409547-2.14127-7
https://www.sciencedirect.com/science/article/pii/B9780124095472141277
A. Rosenfeld
S. Höhm
Jörg Krüger
Jörn Bonse
eng
uncontrolled
Carrier excitation
eng
uncontrolled
Double-pulse
eng
uncontrolled
Interferometer
eng
uncontrolled
Laser ablation
eng
uncontrolled
Femtosecond
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
39305
2017
eng
Article UNSP 100920N, 100920N-1
100920N-9
10092
conferenceobject
SPIE
Bellingham, USA
Society of Photo-Optical Instrumentation Engineers, SPIE
1
--
--
--
Applications of laser-induced periodic surface structures (LIPSS)
Laser-induced periodic surface structures (LIPSS, ripples) are a universal phenomenon that can be observed on almost any material after the irradiation by linearly polarized laser beams, particularly when using ultrashort laser pulses with durations in the picosecond to femtosecond range. During the past few years significantly increasing research activities have been reported in the field of LIPSS, since their generation in a single-step process provides a simple way of nanostructuring and surface functionalization towards the control of optical, mechanical or chemical properties. In this contribution current applications of LIPSS are reviewed, including the colorization of technical surfaces, the control of surface wetting, the tailoring of surface colonization by bacterial biofilms, and the improvement of the tribological performance of nanostructured metal surfaces.
Proceedings of SPIE
978-1-5106-0625-8
978-1-5106-0626-5
10.1117/12.2250919
0277-786X
1996-756X
SPIE Photonics West Conference, Laser-based Micro- and Nanoprocessing XI
San Francisco, USA
27.01.2017
24.07.2017
Jörn Bonse
Sabrina V. Kirner
S. Höhm
Nadja Epperlein
Dirk Spaltmann
A. Rosenfeld
Jörg Krüger
eng
uncontrolled
Laser-induced periodic surface structures (LIPSS)
eng
uncontrolled
Laser processing
eng
uncontrolled
Surface functionalization
eng
uncontrolled
Application
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Graue Literatur
42174
2017
eng
Article 12306, 1
14
7
article
Springer Nature
1
--
--
--
Spontaneous periodic ordering on the surface and in the bulk of dielectrics irradiated by ultrafast laser: a shared electromagnetic origin
Periodic self-organization of matter beyond the diffraction limit is a puzzling phenomenon, typical both for surface and bulk ultrashort laser processing. Here we compare the mechanisms of periodic nanostructure formation on the surface and in the bulk of fused silica. We show that volume nanogratings and surface nanoripples having subwavelength periodicity and oriented perpendicular to the laser polarization share the same electromagnetic origin. The nanostructure orientation is defined by the near-field local enhancement in the vicinity of the inhomogeneous scattering centers. The periodicity is attributed to the coherent superposition of the waves scattered at inhomogeneities. Numerical calculations also support the multipulse accumulation nature of nanogratings formation on the surface and inside fused silica. Laser surface processing by multiple laser pulses promotes the transition from the high spatial frequency perpendicularly oriented nanoripples to the low spatial frequency ripples, parallel or perpendicular to the laser polarization. The latter structures also share the electromagnetic origin, but are related to the incident field interference with the scattered far-field of rough non-metallic or transiently metallic surfaces. The characteristic ripple appearances are predicted by combined electromagnetic and thermo-mechanical approaches and supported by SEM images of the final surface morphology and by time-resolved pump-probe diffraction measurements.
Scientific Reports
10.1038/s41598-017-12502-4
https://www.nature.com/articles/s41598-017-12502-4
2045-2322
urn:nbn:de:kobv:b43-421747
12.10.2017
Creative Commons - Namensnennung
A. Rudenko
J.-P. Colombier
S. Höhm
A. Rosenfeld
Jörg Krüger
Jörn Bonse
T.E. Itina
eng
uncontrolled
Laser-induced periodic surface structures (LIPSS)
eng
uncontrolled
Femtosecond laser
eng
uncontrolled
Nanostructures
eng
uncontrolled
Dielectrics
eng
uncontrolled
Electromagnetic scattering
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Verlagsliteratur
Datei für die Öffentlichkeit verfügbar ("Open Access")
Wissenschaftliche Artikel der BAM
Bundesanstalt für Materialforschung und -prüfung (BAM)
https://opus4.kobv.de/opus4-bam/files/42174/2017-Rudenko_SciRep7_12306.pdf