Preparation of antireflective films on small square KH2PO4/KD2PO4 crystals by spin coating

Bin Shen; Haiyuan Li; Liyi Zhao; Yongxing Tang

doi:10.1117/12.2264081

8 March 2017 Preparation of antireflective films on small square KH₂PO₄/KD₂PO₄ crystals by spin coating

Bin Shen, Haiyuan Li, Liyi Zhao, Yongxing Tang

Proceedings Volume 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016; 102550W (2017) https://doi.org/10.1117/12.2264081
Event: Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 2016, Jinhua, Suzhou, Chengdu, Xi'an, Wuxi, China

Abstract

Modified antireflective thin films for optical crystals are developed by sol gel chemistry. Hexamethyldisilazane is added to silica sol to prepare modified sol by the Stöber method. The particle size distribution of the modified sol is found to have good uniformity, with an average particle diameter of about 42.14 nm. This sol can be used to prepare antireflective films with low refractive index of about 1.2. Homogeneous double layered films of antireflective and moisture resistant properties are demonstrated to coat small square sized KH₂PO₄/KD₂PO₄crystals through a combination of dip and spin coating. The modified antireflective films display residual reflectivity close to zero, and laser induced damage threshold of 10.9 J/cm² (pulse wavelength: 355nm, pulse width: 3ns) measured by raster scan method.

Citation Download Citation

Bin Shen, Haiyuan Li, Liyi Zhao, and Yongxing Tang "Preparation of antireflective films on small square KH₂PO₄/KD₂PO₄ crystals by spin coating", Proc. SPIE 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 102550W (8 March 2017); https://doi.org/10.1117/12.2264081

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