Terahertz magneto-optical response of bismuth-gadolinium-substituted rare-earth garnet film
点击次数：发表时间：2025-05-23
- 所属单位：[1]Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610065, Sichuan, Peoples R China;[2]Nankai Univ, Inst Modern Opt, Tianjin Key Lab Optoelect Sensor & Sensing Techno, Tianjin 300350, Peoples R China;[3]Univ Elect Sci & Technol China, Yangtze Delta Reg Inst, Huzhou 313001, Zhejiang, Peoples R China
- 发表刊物：OPTICS EXPRESS
- 关键字：Bismuth - Gadolinium - Garnets - Light modulators - Magnetic fields - Thick films
- 摘要：We report the magneto-optical Faraday response of bismuth-gadolinium-substituted rare-earth iron garnet at terahertz frequencies ranging from 100 GHz to 1.2 THz. The maximum transmittance of +/- 45 degrees component is about 60% near the frequency point of 0.63 THz. When the external magnetic field change from -100 mT to +100 mT, the Faraday rotation angle is between -6 degrees and +7.5 degrees. The overall change of ellipticity is relatively small. The maximum value of the Verdet constant is about 260 degrees/mm/T at 0.1 THz and then gradually decreases to 80 degrees/mm/T at 1.2 THz. Within the considered frequency range, the thick film exhibits magnetically tunable, non-reciprocal characters and a strong magneto-optical effect within a small external magnetic field at room temperature, which will be widely used for the terahertz isolators, circulators, nonreciprocal phase shifters, and magneto-optical modulators. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
- 文献类型：Article
- 卷号：29
- 期号：15
- 页面范围：23540-23548
- ISSN号：1094-4087
- 是否译文：否
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- 性别：男
- 职称：教授
- 毕业院校：电子科技大学
- 学历：博士研究生毕业
- 学位：工学博士学位
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- 2012 当选： 新世纪优秀人才计划
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