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Ultrabroadband suppression of mid-infrared reflection losses of a layered semiconductor by nanopatterning with a focused ion beam

Ultrabroadband suppression of mid-infrared reflection losses of a layered semiconductor by nanopatterning with a focused ion beam

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HAGNER, Matthias, Philipp SULZER, Andreas LIEHL, Moritz CIMANDER, Hannes KEMPF, Annika BITZER, Alexa HERTER, Alfred LEITENSTORFER, 2021. Ultrabroadband suppression of mid-infrared reflection losses of a layered semiconductor by nanopatterning with a focused ion beam. In: Optics Express. Optica Publishing Group. 29(21), pp. 33632-33641. eISSN 1094-4087. Available under: doi: 10.1364/OE.433703

@article{Hagner2021Ultra-55455, title={Ultrabroadband suppression of mid-infrared reflection losses of a layered semiconductor by nanopatterning with a focused ion beam}, year={2021}, doi={10.1364/OE.433703}, number={21}, volume={29}, journal={Optics Express}, pages={33632--33641}, author={Hagner, Matthias and Sulzer, Philipp and Liehl, Andreas and Cimander, Moritz and Kempf, Hannes and Bitzer, Annika and Herter, Alexa and Leitenstorfer, Alfred} }

2021 Herter, Alexa Liehl, Andreas Sulzer, Philipp Liehl, Andreas Hagner, Matthias Ultrabroadband suppression of mid-infrared reflection losses of a layered semiconductor by nanopatterning with a focused ion beam Leitenstorfer, Alfred Hagner, Matthias 2021-11-08T08:31:40Z Moth-eye structures are patterned onto gallium selenide surfaces with sub-micrometer precision. In this way, Fresnel reflection losses are suppressed to below one percent within an ultrabroad optical bandwidth from 15 to 65 THz. We tune the geometry by rigorous coupled-wave analysis. Subsequently, ablation with a Ga<sup>+</sup> ion beam serves to write optimized structures in areas covering 30 by 30 μm. The benefits are demonstrated via optical rectification of femtosecond laser pulses under tight focusing, resulting in emission of phase-stable transients in the mid-infrared. We analyze the performance of antireflection coating directly in the time domain by ultrabroadband electro-optic sampling. 2021-11-08T08:31:40Z Cimander, Moritz eng Kempf, Hannes Bitzer, Annika Leitenstorfer, Alfred Kempf, Hannes Sulzer, Philipp Bitzer, Annika Herter, Alexa terms-of-use Cimander, Moritz

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