Alkali Metal/Mercury Dual-Metal Sulfides as Infrared Nonlinear Optical Materials with High Laser-induced Damage Thresholds

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-04-14 DOI:10.1039/d5dt00180c

Guili Wang, Bohui Xu, Chunxiao Li, Pifu Gong, Zheshuai Lin, Jiyong Yao

引用次数: 0

Abstract

Two new mercury-based sulfides, Rb2HgGe3S8 and Cs2HgGe3S8, were successfully synthesized by the high-temperature solid-state reaction, and they are isostructural to crystallize in the non-centrosymmetric orthorhombic space group P212121. The results of the experiments indicate that Rb2HgGe3S8 has a large band gap of 3.26 eV, a second harmonic generation (SHG) response of 0.17 × AgGaS2 (AGS) at the particle size of 90−125 μm, and non-phase-matchable (NPM) properties. Additionally, Cs2HgGe3S8 exhibits a SHG response of 0.13 × AGS (particle size of 90−125 μm) as well as type-I phase-matchable (PM) performance at 2090 nm. Moreover, Rb2HgGe3S8 and Cs2HgGe3S8 exhibit high laser-induced damage thresholds of 3.1 and 2.7 × AGS, respectively. Theoretical calculations reveal that Rb2HgGe3S8 and Cs2HgGe3S8 are two direct semiconductors with the calculated band gap of 2.32 and 2.15 eV and the synergistic action of [HgS4] and [GeS4] units realizes their SHG response.

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碱金属/汞双金属硫化物作为高激光损伤阈值的红外非线性光学材料

采用高温固相反应成功合成了两种新型汞基硫化物Rb2HgGe3S8和Cs2HgGe3S8，它们在非中心对称正交空间群P212121中呈等晶结构。实验结果表明，Rb2HgGe3S8在90 ~ 125 μm粒径范围内具有3.26 eV的大带隙、0.17 × AgGaS2 （AGS）的二次谐波响应和非相位匹配（NPM）特性。此外，Cs2HgGe3S8在2090 nm处的SHG响应为0.13 × AGS（粒径为90 ~ 125 μm），具有i型相匹配（PM）性能。Rb2HgGe3S8和Cs2HgGe3S8具有较高的激光损伤阈值，分别为3.1和2.7 × AGS。理论计算表明，Rb2HgGe3S8和Cs2HgGe3S8是两种直接半导体，计算出的带隙分别为2.32和2.15 eV， [HgS4]和[GeS4]单元的协同作用实现了它们的SHG响应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.