Fabrication of anti-reflective microstructures on chalcogenide crystals by femtosecond laser ablation

A Yb femtosecond laser was used to fabricate antireflective microstructures on CdSSe single crystal samples. We investigated several microstructure fabrication methods, including direct single pulse ablation using 200 fs pulses, ablation with in-depth focusing, ablation in the presence of additional...

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Bibliographic Details
Published in:Optical materials express 2019-04, Vol.9 (4), p.1689
Main Authors: Bushunov, Andrey A., Tarabrin, Mikhail K., Lazarev, Vladimir A., Karasik, Valeriy E., Korostelin, Yurii V., Frolov, Mikhail P., Skasyrsky, Yan K., Kozlovsky, Vladimir I.
Format: Article
Language:English
Subjects:
Crystals
Femtosecond pulsed lasers
Infrared analysis
Laser ablation
Microstructure
Single crystals
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Summary:A Yb femtosecond laser was used to fabricate antireflective microstructures on CdSSe single crystal samples. We investigated several microstructure fabrication methods, including direct single pulse ablation using 200 fs pulses, ablation with in-depth focusing, ablation in the presence of additional spherical aberration and ablation with obstruction of peripheral rays. We performed a comprehensive analysis of the implemented antireflection microstructure fabrication methods. The performances of the antireflection microstructures were measured using an infrared Fourier spectrum analyzer and the best samples demonstrated >99%>99% transmission in the 4.5–6 µm range and average transmission near 97%97% in range from 2.7 to 8 µm.
ISSN:2159-3930
2159-3930
DOI:10.1364/OME.9.001689