TY - GEN A1 - Berkmann, F. A1 - Steuer, Oliver A1 - Ganss, Fabian A1 - Prucnal, Slawomir A1 - Schwarz, Daniel A1 - Fischer, Inga Anita A1 - Schulze, Jörg T1 - Sharp MIR plasmonic modes in gratings made of heavily doped pulsed laser-melted Ge1-xSnx T2 - Optical Materials Express Y1 - 2023 U6 - https://doi.org/10.1364/OME.479637 SN - 2159-3930 VL - 13 IS - 3 SP - 752 EP - 763 ER - TY - GEN A1 - Oleynik, Paul A1 - Berkmann, Fritz A1 - Reiter, Sebastian A1 - Schlipf, Jon A1 - Ratzke, Markus A1 - Yamamoto, Yuji A1 - Fischer, Inga Anita T1 - Strong Optical Coupling of Lattice Resonances in a Top-down Fabricated Hybrid Metal–Dielectric Al/Si/Ge Metasurface T2 - Nano Letters N2 - Optical metasurfaces enable the manipulation of the light–matter interaction in ultrathin layers. Compared with their metal or dielectric counterparts, hybrid metasurfaces resulting from the combination of dielectric and metallic nanostructures can offer increased possibilities for interactions between modes present in the system. Here, we investigate the interaction between lattice resonances in a hybrid metal–dielectric metasurface obtained from a single-step nanofabrication process. Finite-difference time domain simulations show the avoided crossing of the modes appearing in the wavelength-dependent absorptance inside the Ge upon variations in a selected geometry parameter as evidence for strong optical coupling. We find good agreement between the measured and simulated absorptance and reflectance spectra. Our metasurface design can be easily incorporated into a top-down optoelectronic device fabrication process with possible applications ranging from on-chip spectroscopy to sensing. KW - metamaterials KW - semiconductors KW - hybridization KW - optoelectronics Y1 - 2024 U6 - https://doi.org/10.1021/acs.nanolett.3c05050 SN - 1530-6984 SN - 1530-6992 VL - 24 IS - 10 SP - 3142 EP - 3149 ER - TY - GEN A1 - Schlipf, Jon A1 - Berkmann, Fritz A1 - Yamamoto, Yuji A1 - Reichenbach, Marc A1 - Veleski, Mitko A1 - Kawaguchi, Y. A1 - Mörz, Florian A1 - Tomm, Jens W. A1 - Weißhaupt, David A1 - Fischer, Inga Anita T1 - Robust Si/Ge heterostructure metasurfaces as building blocks for wavelength-selective photodetectors T2 - Applied Physics Letters Y1 - 2023 U6 - https://doi.org/10.1063/5.0134458 SN - 1077-3118 VL - 122 IS - 12 ER -