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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, Tianjin Key Lab Optoelect Sensor & Sensing Networ, Inst Modern Opt, Tianjin 300350, Peoples R China

发表刊物：OPTICS EXPRESS

关键字：Iron - Laser pulses - Magnetooptical effects - Permittivity - Polarization - Refractive index - Saturation magnetization - Single crystals - Terahertz spectroscopy - Terahertz waves - Thick films - Time domain analysis - Yttrium iron garnet

摘要：The wafer-scale La:YIG single crystal thick films were fabricated on a three-inch gadolinium gallium garnet (GGG) substrate by liquid phase epitaxy method. The terahertz (THz) optical and magneto-optical properties of La:YIG film were demonstrated by THz time domain spectroscopy (THz-TDS). The results show that a high refractive index of approximately 4.09 and a low absorption coefficient of 10-50 cm(-1) from 0.1 to 1.6 THz for this La:YIG film. Moreover, the THz Faraday rotation effect of La:YIG film was measured by the orthogonal polarization detection method in THz-TDS system, which can be actively manipulated by a weak longitudinal magnetic field of up to 0.155 T. With 5 samples stacked together, the Faraday rotation angle varies linearly from -15 degrees to 15 degrees, and the Verdet constant of La:YIG is about 100 degrees/mm/T within the saturation magnetization. This magneto-optical single crystal thick film with large area shows low loss, high permittivity and strong magneto-optical effect in the THz regime, which will be widely used in magneto-optical polarization conversion, nonreciprocal phase shifter and isolator for THz waves. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

文献类型：Article

卷号：28

期号：14

页面范围：21062-21071

ISSN号：1094-4087

是否译文：否