Open AccessHigh performance ZnS antireflection sub-wavelength structures with HfO2 protective film for infrared optical windows
Author(s) -
Fei Liu,
Hongfei Jiao,
Jinlong Zhang,
Bin Yin,
Huasong Liu,
Yiqin Ji,
Zhanshan Wang,
Xinbin Cheng
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.439405
Subject(s) - materials science , infrared , optics , optoelectronics , wavelength , coating , optical coating , refractive index , polarization (electrochemistry) , anti reflective coating , composite material , chemistry , physics
Antireflection sub-wavelength structures (SWSs) on ZnS were designed and ZnS SWSs with HfO 2 protective film were prepared, and their properties in long-wave infrared applications were examined and compared to AR coatings. The SWS has good antireflection performance and exhibits less polarization sensitivity than the AR coating. At temperatures above 500 °C, the SWS with HfO 2 protective film has a better thermal endurance property than the multilayer AR coating. Moreover, the HfO 2 protective film significantly improved the mechanical properties of the ZnS SWS and was similar to HfO 2 covered AR coating when the HfO 2 film was not broken. This study shows that the ZnS SWS with HfO 2 protective film has promising application prospects in infrared optical windows.