SrZnSnSe: A quaternary selenide with large second harmonic generation and birefringence

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Issue Date
2022-02-08
Authors
Hou, Fengjuan
Mei, Dajiang
Zhang, Yiling
Liang, Fei
Wang, Jian
Lu, Jie
Lin, Zheshuai
Wu, Yuandong
Advisor
Citation

Hou, F., Mei, D., Zhang, Y., Liang, F., Wang, J., Lu, J., . . . Wu, Y. (2022). SrZnSnSe: A quaternary selenide with large second harmonic generation and birefringence. Journal of Alloys and Compounds, 904 doi:10.1016/j.jallcom.2022.163944

Abstract

Infrared nonlinear optical (NLO) materials with great laser conversion efficient play a key role in military and civil fields. SrZnSnSe was synthesized via replacing S elements with Se in SrZnSnS compound. SrZnSnSe crystallizes a two-dimensional layered structure with nearly parallel alignment of anionic groups [ZnSe] and [SnSe]. The experimental results show that the second harmonic generation (SHG) is about 5 times of AgGaS2, and the band gap of SrZnSnSe is 1.82 eV by direct measured method. In combination with theoretical calculation, the SHG coefficients of SrZnSnSe is d33 = 30.03 pm/V, and the birefringence is 0.290 at incident laser of 1240 nm, which can contribute to phase matching. These evidences show that SrZnSnSe can balance well among band gap, frequency doubling effect and birefringence, therefore, it is an excellent candidate for infrared NLO materials.

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