Cargando…

Fabrication of an Anti-Reflective Microstructure on ZnS by Femtosecond Laser Bessel Beams

As an important mid-infrared to far-infrared optical window, ZnS is extremely important to improve spectral transmission performance, especially in the military field. However, on account of the Fresnel reflection at the interface between the air and the high-strength substrate, surface optical loss...

Descripción completa

Detalles Bibliográficos
Autores principales: Li, Xun, Li, Ming, Liu, Hongjun, Guo, Yan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8307567/
https://www.ncbi.nlm.nih.gov/pubmed/34299553
http://dx.doi.org/10.3390/molecules26144278
_version_ 1783728078634090496
author Li, Xun
Li, Ming
Liu, Hongjun
Guo, Yan
author_facet Li, Xun
Li, Ming
Liu, Hongjun
Guo, Yan
author_sort Li, Xun
collection PubMed
description As an important mid-infrared to far-infrared optical window, ZnS is extremely important to improve spectral transmission performance, especially in the military field. However, on account of the Fresnel reflection at the interface between the air and the high-strength substrate, surface optical loss occurs in the ZnS optical window. In this study, the concave antireflective sub-wavelength structures (ASS) on ZnS have been experimentally investigated to obtain high transmittance in the far-infrared spectral range from 6 μm to 10 μm. We proposed a simple method to fabricate microhole array ASS by femtosecond Bessel beam, which further increased the depth of the microholes and suppressed the thermal effects effectively, including the crack and recast layer of the microhole. The influence of different Gaussian and Bessel beam parameters on the microhole morphology were explored, and three ASS structures with different periods were prepared by the optimized Bessel parameters. Ultimately, the average transmittance of the sample with the ASS microhole array period of 2.6 μm increased by 4.1% in the 6 μm to 10 μm waveband, and the transmittance was increased by 5.7% at wavelength of 7.2 μm.
format Online
Article
Text
id pubmed-8307567
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-83075672021-07-25 Fabrication of an Anti-Reflective Microstructure on ZnS by Femtosecond Laser Bessel Beams Li, Xun Li, Ming Liu, Hongjun Guo, Yan Molecules Article As an important mid-infrared to far-infrared optical window, ZnS is extremely important to improve spectral transmission performance, especially in the military field. However, on account of the Fresnel reflection at the interface between the air and the high-strength substrate, surface optical loss occurs in the ZnS optical window. In this study, the concave antireflective sub-wavelength structures (ASS) on ZnS have been experimentally investigated to obtain high transmittance in the far-infrared spectral range from 6 μm to 10 μm. We proposed a simple method to fabricate microhole array ASS by femtosecond Bessel beam, which further increased the depth of the microholes and suppressed the thermal effects effectively, including the crack and recast layer of the microhole. The influence of different Gaussian and Bessel beam parameters on the microhole morphology were explored, and three ASS structures with different periods were prepared by the optimized Bessel parameters. Ultimately, the average transmittance of the sample with the ASS microhole array period of 2.6 μm increased by 4.1% in the 6 μm to 10 μm waveband, and the transmittance was increased by 5.7% at wavelength of 7.2 μm. MDPI 2021-07-14 /pmc/articles/PMC8307567/ /pubmed/34299553 http://dx.doi.org/10.3390/molecules26144278 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Xun
Li, Ming
Liu, Hongjun
Guo, Yan
Fabrication of an Anti-Reflective Microstructure on ZnS by Femtosecond Laser Bessel Beams
title Fabrication of an Anti-Reflective Microstructure on ZnS by Femtosecond Laser Bessel Beams
title_full Fabrication of an Anti-Reflective Microstructure on ZnS by Femtosecond Laser Bessel Beams
title_fullStr Fabrication of an Anti-Reflective Microstructure on ZnS by Femtosecond Laser Bessel Beams
title_full_unstemmed Fabrication of an Anti-Reflective Microstructure on ZnS by Femtosecond Laser Bessel Beams
title_short Fabrication of an Anti-Reflective Microstructure on ZnS by Femtosecond Laser Bessel Beams
title_sort fabrication of an anti-reflective microstructure on zns by femtosecond laser bessel beams
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8307567/
https://www.ncbi.nlm.nih.gov/pubmed/34299553
http://dx.doi.org/10.3390/molecules26144278
work_keys_str_mv AT lixun fabricationofanantireflectivemicrostructureonznsbyfemtosecondlaserbesselbeams
AT liming fabricationofanantireflectivemicrostructureonznsbyfemtosecondlaserbesselbeams
AT liuhongjun fabricationofanantireflectivemicrostructureonznsbyfemtosecondlaserbesselbeams
AT guoyan fabricationofanantireflectivemicrostructureonznsbyfemtosecondlaserbesselbeams