| Autor: |
Gurbatov, S. O., Borodaenko, Yu. M., Pavlov, D. V., Mitsai, E. V., Yelisseyev, A. P., Lobanov, S. I., Isaenko, L. I., Kuchmizhak, A. A. |
| Zdroj: |
Bulletin of the Russian Academy of Sciences: Physics; 2022 Suppl, Vol. 86, pS81-S84, 4p |
| Abstrakt: |
Direct laser processing technologies utilizing femtosecond (fs) pulses allow to create diverse surface morphologies promising for tuning surface reflectivity. In this work, antireflection microstructures (ARMs) representing so-called laser-induced periodic surface structures (LIPSSs) with different orientation, period and roughness were fabricated on the surface of a GaSe crystal for the first time by direct fs-laser patterning. The morphological and structural properties of the fabricated LIPSSs were systematically characterized by combining scanning electron microscopy and Raman micro-spectroscopy, while their optical properties were assessed by Fourier-transform infrared spectroscopy and Finite-Difference Time-Domain simulations. The LIPSSs-based ARMs formed on both sides of the GaSe monocrystals were shown to provide 20% increase in total transmittance of the 2 mm thick GaSe crystal (being compared to pristine one) within 5–14 µm spectral range. Moreover, numerical simulations show no additional light localization effects in the near-surface layer of the LIPSS-patterned surface, highlighting applicability of the laser processing methods for improvement of the optical characteristics of the nonlinear crystals without deterioration of their optical damage threshold. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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