HgSO4: An excellent mid-infrared sulfate nonlinear optical crystal with wide band gap and strong second harmonic generation response

被引：13
作者：
Han, Yinglei [1 ,2 ]
Zhao, Xin [1 ]
Xu, Feng [1 ]
Li, Bingxuan [1 ]
Ye, Ning [3 ]
Luo, Min [1 ]
机构：
[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, Fuzhou 350002, Fujian, Peoples R China
[2] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
[3] Tianjin Univ Technol, Inst Funct Crystal, Tianjin Key Lab Funct Crystal Mat, Tianjin 300384, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 902卷
基金：
中国国家自然科学基金;
关键词：
Nonlinear optics; Sulfates; Mid-infrared; Second harmonic generation; Crystal growth; DAMAGE; POLAR; PRINCIPLES; FLUORIDE; ZNGEP2; RB; CS;
D O I：
10.1016/j.jallcom.2022.163727
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A mercury-based sulfate nonlinear optical (NLO) material, HgSO4, was successfully grown using a hydro-thermal method. It crystallizes in the polar space group Pmn2(1) and forms a three-dimensional spatial network structure consisting of [HgO8] polyhedras and [SO4] polyhedras. The powder second harmonic generation (SHG) measurement showed that HgSO4 is a phase-matching material and has a very strong SHG efficiency of 11 times that of KDP. Such a remarkable SHG response is due to the well-ordered arrangement of the distorted [HgO8] and [SO4] polyhedras. In parallel, large bandgap (4.13 eV) and laser damage threshold (26.5 x AgGaS2) are exhibited. Further characterizations showed that this compound possesses a large birefringence and a wide transmission window from the near-UV to mid-IR, suggesting that HgSO4 may be an excellent mid-IR NLO crystal. (C) 2022 Elsevier B.V. All rights reserved.
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页数：8
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