Broadband Antireflective Hybrid Micro/Nanostructure on Zinc Sulfide Fabricated by Optimal Bessel Femtosecond Laser

被引：2

作者：

Li, Xun ^{[1
]}

Li, Ming ^{[1
]}

机构：

[1] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China

来源：

NANOMATERIALS | 2023年 / 13卷 / 07期

关键词：

femtosecond laser; infrared antireflection; micro/nano hybrid structure; SURFACE-STRUCTURES; MICROSTRUCTURES; SILICON; DESIGN; ZNS;

D O I：

10.3390/nano13071225

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Enhancing the infrared window transmittance of zinc sulfide (ZnS) is important to improve the performance of infrared detector systems. In this work, a new hybrid micro/nanostructure was fabricated by an optimal Bessel femtosecond laser on ZnS substrate. The surface morphologies and profiles of ASS ablated by a 20x microscope objective Bessel beam are described, indicating that the nanoripples on the micropore were formed by the SPP interference and the SPP scattering in a particular direction. Further, the maximum average transmittance of ASS increased by 9.7% and 12.3% in the wavelength ranges of 5 similar to 12 mu m and 8 similar to 12 mu m, respectively. Finally, the antireflective mechanism of the hybrid micro/nanostructure is explored using the novel electromagnetic field model based on the FDTD method, and we attribute the stable antireflective performance of ASS in broadband to the interface effective dielectric effect and LLFE.

引用

页数：10

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