Optical characterization of A1+xBX3 crystals with giant optical anisotropy

Hongyan Mei; Jad Salman; Boyang Zhao; Guodong Ren; Graham Joe; Shanyuan Niu; Huan Zhao; Yucheng Zhou; Thomas Orvis; Huaixun Huyan; Jiangbin Wu; Yang Liu; Han Wang; Rohan Mishra; Jayakanth Ravichandran; Mikhail Kats

doi:10.1117/12.2609007

5 March 2022 Optical characterization of A_1+xBX₃ crystals with giant optical anisotropy

Hongyan Mei, Jad Salman, Boyang Zhao, Guodong Ren, Graham Joe, Shanyuan Niu, Huan Zhao, Yucheng Zhou, Thomas Orvis, Huaixun Huyan, Jiangbin Wu, Yang Liu, Han Wang, Rohan Mishra, Jayakanth Ravichandran, Mikhail Kats

Author Affiliations +

Proceedings Volume PC12011, High Contrast Metastructures XI; PC120110L (2022) https://doi.org/10.1117/12.2609007
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Birefringence is a fundamental optical property of anisotropic materials where the refractive index depends on the polarization of light, and is an essential property for devices such as waveplates and polarizers. In 2018, we reported barium titanium sulfide (BaTiS3) to have a broadband birefringence of 0.76 spanning the mid-to-far-infrared range, exhibiting the largest in-plane birefringence of any known bulk materials. In this talk, we will present the characterization of giant birefringence of two more engineered A1+xBX3 crystals, strontium titanium sulfide (Sr1+xTiS3) and barium titanium selenide (BaTiSe3). Our characterization combines polarization-resolved infrared spectroscopy with generalized ellipsometry to extract the optical properties.

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Hongyan Mei, Jad Salman, Boyang Zhao, Guodong Ren, Graham Joe, Shanyuan Niu, Huan Zhao, Yucheng Zhou, Thomas Orvis, Huaixun Huyan, Jiangbin Wu, Yang Liu, Han Wang, Rohan Mishra, Jayakanth Ravichandran, and Mikhail Kats "Optical characterization of A_1+xBX₃ crystals with giant optical anisotropy", Proc. SPIE PC12011, High Contrast Metastructures XI, PC120110L (5 March 2022); https://doi.org/10.1117/12.2609007

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