Honeycomb layered topology construction for exceptional long-wave infrared nonlinear optical crystals

Jindong Chen; Chensheng Lin; Xiaotian Jiang; Guangsai Yang; Min Luo; Xin Zhao; Bingxuan Li; Guang Peng; Ning Ye; Zhanggui Hu; Jiyang Wang; Yicheng Wu

doi:10.1039/d3mh00257h

Honeycomb layered topology construction for exceptional long-wave infrared nonlinear optical crystals

Mater Horiz. 2023 Jul 31;10(8):2876-2882. doi: 10.1039/d3mh00257h.

Authors

Affiliations

¹ Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin 300384, China. gpeng@email.tjut.edu.cn.
² Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou, Fujian 350002, China.
³ State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.

PMID: 37161622
DOI: 10.1039/d3mh00257h

Abstract

Nonlinear optical (NLO) crystals capable of efficient long-wave infrared (8-14 μm) laser output remain scarce, and the exploration of long-wave IR NLO materials with superior comprehensive optical performances is a momentous challenge. Herein, we develop two selenide-halide NLO crystals, Hg₃AsSe₄Br and Hg₃AsSe₄I, which are derived from the honeycomb layered topology of prototype GaSe. Remarkably, they exhibit not only strong SHG effects, suitable band gap, large birefringence, broad IR transparency range and low two-photon absorption coefficients but reinforced interlayer interaction and more benign crystal growth habit, compared to those of GaSe, indicating that they are promising long-wave IR NLO materials. Moreover, Hg₃AsSe₄I achieved better comprehensive optical properties than conventional IR crystals, GaSe, ZnGeP₂, CdSe and AgGaSe₂. The idea of honeycomb layered topology construction provides a material design heuristic to explore cutting-edge IR NLO materials.