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人工晶体学报 ›› 2021, Vol. 50 ›› Issue (1): 20-24.

• 研究论文 • 上一篇    下一篇

减少ZnGeP2晶体1~2.5 μm光学吸收的研究

赵鑫1,2, 谢华1, 方声浩1,2, 庄巍1, 叶宁1   

  1. 1.中国科学院福建物质结构研究所,福州 350002;
    2.中国科学院大学,北京 100049
  • 收稿日期:2020-11-26 出版日期:2021-01-15 发布日期:2021-03-01
  • 通讯作者: 叶 宁,博士,研究员。E-mail: nye@fjirsm.ac.cn
  • 作者简介:赵 鑫(1996—),男,贵州省人,硕士研究生。E-mail:zhaoxin@fjirsm.ac.cn
  • 基金资助:
    国家自然科学基金重大项目(51890862)

Reducing Optical Absorption of ZnGeP2 Crystal in 1~2.5 μm

ZHAO Xin1,2, XIE Hua1, FANG Shenghao1,2, ZHUANG Wei1, YE Ning1   

  1. 1. Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China;
    2. University of the Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-11-26 Online:2021-01-15 Published:2021-03-01

摘要: ZnGeP2晶体在1~2.5 μm有几个吸收峰,此波段的吸收峰主要是由于点缺陷VP、GeZn和VZn引起的,这些光学吸收严重影响ZnGeP2晶体在光参量振荡器中的应用性能。针对ZnGeP2在此波段的光学吸收,基于电子-原子核散射理论,通过理论计算模拟电子辐照来寻找合适的辐照条件,对布里奇曼法生长出的ZnGeP2单晶分别进行退火热处理和电子辐照处理,并采用红外光谱仪和综合物理性能测量系统测试不同条件下ZnGeP2晶体的红外吸收光谱、霍尔系数和载流子浓度。结果表明退火热处理能有效减少ZnGeP2晶体在1.2 μm和1.4 μm附近的光学吸收,而电子辐照处理有利于减少ZnGeP2晶体在2.0 μm附近的光学吸收,实验结果与计算结果一致。

关键词: ZnGeP2, 点缺陷, 布里奇曼法, 红外吸收, 霍尔效应

Abstract: ZnGeP2 crystal has several absorption peaks in 1 μm to 2.5 μm, which are mainly caused by point defect VP, GeZn and VZn. These optical absorption seriously affect the applied performance in optical parametric oscillator. Therefore, theoretical calculation of electron irradiation based on the electron-nucleus scattering theory were executed to understand the effective experiment condition. The ZnGeP2 single crystal was grown by Bridgman method, then the infrared absorption spectrum, Hall coefficient and carrier concentration of as grown ZnGeP2, annealed ZnGeP2 and irradiated ZnGeP2 were tested by infrared spectrometer and physical performance mearsurement system. The results show that annealed treatment can effectively reduce the optical absorption of ZnGeP2 crystal near 1.2 μm and 1.4 μm, while electron irradiation treatment is beneficial to reduce the optical absorption of ZnGeP2 crystal near 2.0 μm, which is consistent with the calculated results.

Key words: ZnGeP2, point defect, Bridgman method, IR absorption spectrum, Hall effect

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