Filtern
Erscheinungsjahr
Dokumenttyp
- Zeitschriftenartikel (129)
- Vortrag (68)
- Posterpräsentation (31)
- Beitrag zu einem Tagungsband (29)
- Buchkapitel (10)
- Beitrag zu einem Sammelband (4)
- Monografie (1)
- Video (1)
Schlagworte
- Laser-induced periodic surface structures (LIPSS) (70)
- Femtosecond laser ablation (40)
- Femtosecond laser (32)
- Surface functionalization (31)
- Laser processing (23)
- Laser ablation (19)
- Laser-induced periodic surface structures, LIPSS (12)
- Silicon (12)
- Nanostructures (11)
- Applications (10)
- Oxidation (10)
- Friction (9)
- Radiation protection (9)
- Tribology (9)
- Wear (9)
- Ablation (7)
- Femtosecond laser processing (7)
- Laser-induced X-ray emission (7)
- Laser-induced periodic surface structures (7)
- Microstructures (7)
- Steel (7)
- High-speed optical techniques (6)
- Indium phosphide (6)
- Laser beam effects (6)
- Atomic force microscopy (5)
- Dielectrics (5)
- Electromagnetic scattering (5)
- Raman spectroscopy (5)
- Silicon compounds (5)
- Capillary waves (4)
- Chalcopyrite (4)
- Double-pulse experiments (4)
- Titanium (4)
- Ultrafast optical techniques (4)
- Ultrashort laser material interaction (4)
- Ultrashort laser pulses (4)
- Biofilms (3)
- Damage threshold (3)
- Fluid transport (3)
- Free electron laser (3)
- Glass (3)
- Hard X-ray photoelectron spectroscopy (HAXPES) (3)
- Industrial applications (3)
- LIPSS (3)
- Mach-Zehnder interferometer (3)
- Oberflächenfunktionalisierung (3)
- Optical properties (3)
- Polycarbonate (3)
- Polymer (3)
- Refractive index (3)
- Scanning electron microscopy (3)
- Semiconductor (3)
- Surface morphology (3)
- Surface plasmon polaritons (3)
- Surface structure (3)
- Time-resolved scattering (3)
- Titanium alloy (3)
- Titanium nitride (3)
- Ultrafast laser processing (3)
- Ultrashort pulsed laser (3)
- Wetting (3)
- XANES (3)
- Anodization (2)
- Auger electron spectroscopy (2)
- Cell adhesion (2)
- Chemical analysis (2)
- Cribellate spiders (2)
- Cu(InGa)Se2 (2)
- Direct laser interference patterning (DLIP) (2)
- Doping (2)
- Elemental semiconductors (2)
- Femtosecond (2)
- Femtosecond laser irradiation (2)
- Femtosecond laser patterning (2)
- Finite-difference time-domain calculations (2)
- Fused silica (2)
- Glasses (2)
- Incubation (2)
- Laser (2)
- Laser damage (2)
- Laser-Materialbearbeitung (2)
- Laser-induced forward transfer (2)
- Laser-induced forward transfer (LIFT) (2)
- Laser-induced oxide layer (2)
- Laser-induced x-ray emission (2)
- Light concentration (2)
- Lizard (2)
- Magnesium compounds (2)
- Metals (2)
- Micro solar cell (2)
- Micro solar cells (2)
- Micro-concentrator solar cell (2)
- Microscopy (2)
- Microstructure (2)
- Modelling (2)
- Nanosecond laser (2)
- Nanosecond laser ablation (2)
- Nanostrukturen (2)
- Niobium (2)
- Optical breakdown (2)
- Pacemaker (2)
- Photovoltaics (2)
- Polaritons (2)
- Potassium compounds (2)
- Pump-probe experiments (2)
- Scanning force microscopy (2)
- Secondary hazard (2)
- Selective emitter (2)
- Self-organization (2)
- Semiconductors (2)
- Silica (2)
- Spectroscopic imaging ellipsometry (2)
- Surface modification (2)
- Surface plasmons (2)
- Surface texture (2)
- Surface wetting (2)
- TeO2 (2)
- Tellurium dioxide crystals (2)
- Ti6Al4V alloy (2)
- Time-of-flight mass spectroscopy (2)
- Time-of-flight secondary ion mass spectrometry (ToF-SIMS) (2)
- Time-resolved measurements (2)
- Transmission electron microscopy (2)
- Ultra-short pulse laser processing (2)
- Ultrashort laser processing (2)
- Ultrashort pulse laser processing (2)
- X-ray (2)
- (LIPSS) (1)
- 100Cr6 (1)
- 532 nm wavelength (1)
- ASTM (1)
- Ab initio calculations (1)
- Absorber optimization (1)
- Additive (1)
- Additives (1)
- Advanced applications (1)
- Aluminium (1)
- Amorphization (1)
- Analysis (1)
- Anodic oxidation (1)
- Antiadhesive surfaces (1)
- Antibacterial surfaces (1)
- Antibakterielle Oberflächen (1)
- Antimicrobial (1)
- Application (1)
- Bacteria (1)
- Bacteria-repellent surfaces (1)
- Bacterial adhesion (1)
- Bacterial adhesion tests (1)
- Bariumalumoborosilicate glass (1)
- Bessel-Strahlen (1)
- Biofilm (1)
- Biofilm formation (1)
- Biofilm growth (1)
- Biofilme (1)
- Bioinspiration (1)
- Biomimetic (1)
- Biomimetic surfaces (1)
- Biomometics (1)
- Bionic materials (1)
- Bond lengths (1)
- Bone screws (1)
- Bug (1)
- Bulk metallic glasses (1)
- Bulk temperature (1)
- CIGS (1)
- CIGSe (1)
- CIGSe micro solar cells (1)
- Calamistrum (1)
- Carbon fibers (1)
- Carrier excitation (1)
- Carrier plasmas (1)
- Cell appendages (1)
- Cell-repellent surfaces (1)
- Ceramic matrix composites (1)
- Chalkopyrite (1)
- Chemical analyses (1)
- Coefficient of thermal expansion (1)
- Coherent scattering (1)
- Conduction bands (1)
- Copper indium gallium diselenide (CIGSe) (1)
- Copper-indium-gallium-diselenide (1)
- Crystallization (1)
- Cu(In,Ga)Se2 (1)
- CuInSe2 (1)
- D7755-11 (1)
- Darkfield microscopy (1)
- Debris (1)
- Dentistry (1)
- Diffusion (1)
- Direct laser interference patterning (1)
- Double-pulse (1)
- Drude model (1)
- Dünnschichtsolarzellen (1)
- EDX (1)
- Editorial (1)
- Electrical properties (1)
- Electrochemical treatment (1)
- Electromagnetic radiation (1)
- Electromagnetic theories (1)
- Electron backscattering diffraction (EBSD) (1)
- Electron microscopy (1)
- Electrospinning (1)
- European funding strategies (1)
- F pili (1)
- FS-laser ablation (1)
- Femtosecond laser modifications (1)
- Femtosecond laser pulse (1)
- Femtosecond laser-processing (1)
- Femtosecond phenomena (1)
- Femtosecond pulse laser (1)
- Femtosekunden-Laserablation (1)
- Femtosekundenlaser (1)
- Fluid-flow (1)
- Force distance curve (1)
- Fourier transforms (1)
- Free electron laser (FEL) (1)
- Free electron lasers (1)
- Fs-Laser (1)
- Fs-laser patterning (1)
- Fs-time resolved microscopy (1)
- Functional properties (1)
- Glass structure (1)
- Glass transformation temperature (1)
- Glow-discharge optical emission spectroscopy (1)
- Grain orientation (1)
- Grating (1)
- Heat affected zone (1)
- Heat diffusion (1)
- Hexagonally-arranged nano-protrusions (1)
- Hierarchical structures (1)
- Hydrodynamics (1)
- Implant material (1)
- Indium (1)
- Indium Phosphide (1)
- Indium islands (1)
- Industrial application (1)
- Interferometer (1)
- Ionic liquid (1)
- Isotopes (1)
- LIFT (1)
- Large area structuring (1)
- Laser Machining (1)
- Laser Processing (1)
- Laser induced periodic surface structures (1)
- Laser induced periodic surface structures (LIPSS) (1)
- Laser irradiation (1)
- Laser material processing (1)
- Laser materials processing (1)
- Laser materials-processing applications (1)
- Laser nanostructuring (1)
- Laser radiation effects (1)
- Laser safety (1)
- Laser scanning microscopy (1)
- Laser scribing (1)
- Laser technology (1)
- Laser-induced Periodic Surface Structures (LIPSS) (1)
- Laser-induced amorphization (1)
- Laser-induced damage threshold (1)
- Laser-induced micro- and nanostructures (1)
- Laser-induced nanostructures (1)
- Laser-induced periodic surface strctures (LIPSS) (1)
- Laser-induced periodic surface strcutures (LIPSS) (1)
- Laser-induced periodic surface strcutures, LIPSS (1)
- Laser-induzierte periodische Oberflächen-Nanostrukturen (1)
- Laser-induzierte periodische Oberflächenstrukturen (1)
- Laser-modified surface (1)
- Lasers (1)
- Laserschutz (1)
- Laserstrukturierung (1)
- Light transmission (1)
- Literature survey (1)
- Lizards (1)
- Lubrication (1)
- Material sciences (1)
- Materialbearbeitung (1)
- Matter reorganization (1)
- Matter reorganization theories (1)
- Medical implants (1)
- Melting (1)
- Michelson interferometer (1)
- Micro raman spectroscopy (1)
- Microbial adhesion tests (1)
- Microbial adhesions (1)
- Microconcentrator solar cell (1)
- Micromachining (1)
- Mikrostrukturen (1)
- Molybdenum (1)
- Molybdenum substrate (1)
- Monochromators (1)
- Multicrystalline silicon (1)
- Multiphoton absorption (1)
- Nanofibers (1)
- Nanometrology (1)
- Nanosecond laser irradiation (1)
- Nanosecond pulses (1)
- Nanostrcutures (1)
- Nanostructuring (1)
- Native oxide layer (1)
- Neodymium (1)
- Networks (1)
- Nonlinear lithography (1)
- Nonlinear refractive index (1)
- Oberflächenmodifikation (1)
- Ophthalmology (1)
- Optical coatings (1)
- Optical components (1)
- Optical harmonic generation (1)
- Optical microscopy (1)
- Optical pulse shaping (1)
- Optical scattering (1)
- Optical storage (1)
- Optics at surfaces (1)
- PAG (1)
- Phase mask (1)
- Phase-contrast microscopy (1)
- Photoelektron spectroscopy (1)
- Photovoltaik (1)
- Physical vapor deposition (1)
- Picosecond (1)
- Plasma formation (1)
- Plasma processing (1)
- Polarisation (1)
- Polyethylene (1)
- Polyethylene terephthalate (1)
- Polyimide (1)
- Polymethylmethacrylate (1)
- Potassium-magnesium silicate glass (1)
- Protection housing (1)
- Pulse Laser (1)
- Pulse duration (1)
- Pulse shaping (1)
- Pump-probe (1)
- Quantitative phase-contrast microscopy (1)
- Quarzglas (1)
- Reactive oxygen species (1)
- Reflectivity measurements (1)
- Refractive index engineering (1)
- Reibung (1)
- Reibungsreduktion (1)
- Ripples (1)
- Röntgenemission (1)
- SEM (1)
- Saphir (1)
- Sapphire (1)
- Scanning Auger electron microscopy (1)
- Scanning Force Microscopy (1)
- Scanning/atomic force microscopy (SFM/AFM) (1)
- Scattering (1)
- Second harmonic generation (SHG) (1)
- Second-generation high temperature superconductor technology (1)
- Sekundärstrahlung (1)
- Self-induced transparency (1)
- Semiconductor materials (1)
- Silicate glass systems (1)
- Silicate glasses (1)
- Silicon nitride (1)
- Silicon oxide (1)
- Silicon solar cell (1)
- Simulation (1)
- Sliding (1)
- Solar cell (1)
- Solid lasers (1)
- Solid-state plasma (1)
- Spatial light interference microscopy (1)
- Sputter deposition (1)
- Stiffness (1)
- Strain (1)
- Structural relaxation (1)
- Superconductivity (1)
- Surface (1)
- Surface chemistry (1)
- Surface engineering (1)
- Surface oxidation (1)
- Surface plasmon polariton (1)
- Surface processing (1)
- Surface reflectivity (1)
- Surface structures (1)
- Surface superconductivity (1)
- Theoretical modelling (1)
- Thin films (1)
- Thin-film solar cells (1)
- Threshold of silicon (1)
- Ti6Al4V alloys (1)
- TiAl64V (1)
- Time-of-flight mass spectrometry (TOF-MS) (1)
- Time-offlight secondary ion mass spectrometry (ToF-SIMS) (1)
- Time-resolved analysis (1)
- Time-resolved coherent XUV scattering (1)
- Time-resolved coherent scattering (1)
- Time-resolved microscopy (1)
- Time-resolved reflectivity measurements (1)
- Titanium alloys (1)
- Titanium nitride films (1)
- ToF-SIMS (1)
- Transmission measurements (1)
- Tribologie (1)
- Ultrafast laser excitation (1)
- Ultrafast microscopy (1)
- Ultrafast optics (1)
- Ultrafast phenomena (1)
- Ultrafast scattering (1)
- Ultrakurze Laserpulse (1)
- Ultrakurzpuls-Laser (1)
- Ultrakurzpuls-Laserbearbeitung (1)
- Ultrashort (1)
- Ultrashort lasers (1)
- VUV nanosecond laser ablation (1)
- Verschleiß (1)
- Verschleißreduktion (1)
- X-ray emission (1)
- X-ray emission hazards (1)
- X-ray energies (1)
- X-ray photoelectron spectroscopy (1)
- X-ray spectrum (1)
- XUV scattering (1)
- a-Si/my-Si (1)
- lossy materials (1)
- plasmon lifetime (1)
- second laser (1)
- surface plasmon polaritons (1)
Organisationseinheit der BAM
- 6 Materialchemie (106)
- 6.2 Material- und Oberflächentechnologien (106)
- 9 Komponentensicherheit (16)
- 9.5 Tribologie und Verschleißschutz (16)
- 6.1 Oberflächen- und Dünnschichtanalyse (9)
- 4 Material und Umwelt (8)
- 4.1 Biologische Materialschädigung und Referenzorganismen (8)
- 6.7 Materialsynthese und Design (4)
- 6.6 Physik und chemische Analytik der Polymere (3)
- 5 Werkstofftechnik (1)
- 5.1 Mikrostruktur Design und Degradation (1)
Paper des Monats
- ja (3)
The processing of laser-induced periodic surface structures (LIPSS) represents a simple and robust way for the nanostructuring of solids that allows creating a wide range of surface functionalities featuring applications in optics, tribology, medicine, energy technologies, etc. While the currently available laser and scanner technology already allows surface processing rates at the m2/min level, industrial applications of LIPSS are sometimes hampered by the complex interplay between the nanoscale surface topography and the specific surface chemistry. This typically manifests in difficulties to control the processing of LIPSS and in limitations to ensure the long-term stability of the created surface functions. This presentation aims to identify some unsolved scientific problems related to LIPSS, discusses the pending technological limitations, and sketches the current state of theoretical modelling. Hereby, it is intended to stimulate further research and developments in the field of LIPSS for overcoming these limitations and for supporting the transfer of the LIPSS technology into industry.
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 femtosecond to picosecond 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, biological, or chemical surface properties. In this contribution the mechanisms of formation and current applications of LIPSS are reviewed, including the colorization of technical surfaces, the control of surface wetting properties, the mimicry of the natural texture of animal integuments, the tailoring of surface colonization by bacterial biofilms, the advancement of medical pacemakers, and the improvement of the tribological performance of nanostructured metal surfaces.
Ablation of single-crystalline (100) indium phosphide wafer surfaces with single 10 fs Ti:sapphire laser pulses in air has been studied by means of complementary cross-sectional transmission electron microscopy, scanning force microscopy, and optical microscopy. A local protrusion of ~70 nm height is generated within the ablation craters for fluences exceeding 0.78 J/cm². This morphological feature has been studied in detail, revealing the material structure of the laser-affected zone and its spatial extent. The resolidified layer (60-200 nm thick) consists of polycrystalline grains (5-15 nm diameter) and is covered by an ~10 nm thick amorphous top layer. Interestingly, the sharp boundary of the solidified layer to the unaffected crystal underneath exhibits a Gaussian-like shape and does not follow the shape of the surface topography. Evidence is presented that the central crater protrusion is formed by near-surface optical breakdown, and that the absorption in the material transiently changes during the femtosecond-laser pulse.
Some applications of polymer films require the microstructuring of partly uneven substrates. This cannot be achieved by conventional photolithography, usually performed with ultraviolet short-pulse lasers (excimer, fourth harmonic Nd:YAG). When processing thermally sensitive or undoped polymers with low optical absorption, the use of femtosecond laser pulses can improve the ablation precision, also reducing the heat-affected zone. Therefore, a Ti:sapphire laser system was employed to perform ablation experiments on polyimide (PI). The irradiated areas were evaluated by means of optical and scanning electron microscopy. Highly oriented ripple structures, which are related to the polarization state of the laser pulses, were observed in the cavities. The relationship between the ablation threshold fluence and the number of laser pulses applied to the same spot is described in accordance with an incubation model.
Advances in ultrafast laser manufacturing: nanostructures, thin films, and scaling perspectives
(2024)
Advanced ultrafast laser technology is a rapidly growing field that currently enables many new industrial and scientific applications. During the last decades, this has been significantly driven by the availability of high-repetition-rate laser sources and novel beam delivery concepts. At the laser side, Moore’s law equally manifests for ultrafast laser technologies, since the average output power of such lasers doubles approximately every two years. This development is mainly driven by the increase of the pulse repetition rates of energetic laser pulses, currently enforcing the development of smart beam control and novel scanning strategies for preventing heat-accumulation and plasma-shielding effects during laser-based materials processing. This keynote presentation addresses the advantages, recent developments, and perspectives of laser processing with ultrashort laser pulses. A special focus is laid on the tailored structuring of thin films as well as the manufacturing and probing of sub-diffraction surface nanostructures – an ongoing race to extreme scales. Current limitations are identified and an outlook to future scaling perspectives will be provided.
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.
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 mimicry of the natural texture of animal integuments, the tailoring of surface colonization by bacterial biofilms, and the improvement of the tribological performance of nanostructured metal surfaces.
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.
In this study, femtosecond laser-induced sub-micrometer structures are generated to modify polyethylene (PE) surface topographies. These surfaces were subjected to bacterial colonization studies with Escherichia coli and Staphylococcus aureus as test strains. The results reveal that the nanostructures do not influence S. aureus coverage, while the adhesion of E. coli is reduced.