Terahertz response of Bi-substituted rare-earth iron garnet

Yi-Lei. Li,Qi-Ye. Wen,Fei. Fan,Ding. Zhang,Qing-Hui. Yang

2021 46TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ)（2021）

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摘要

The terahertz optical and magneto-optical response of Bi-substituted rare-earth iron garnet film were studied from 0.2 to 1.2 THz. The thickness of film is 406 μm. The maximum transmittance is over 55% near the frequency point of 0.35 THz. When the external magnetic field change from -100 mT to +100 mT, the Faraday rotation angle is between -5° and +7°. Large Verdet constants approaching 270 °/T/mm are found. The overall change of ellipticity is relatively small.

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关键词

terahertz optical response,magnetooptical response,bismuth-substituted rare-earth iron garnet film,external magnetic field,transmittance,Faraday rotation angle,Verdet constants,frequency 0.2 THz to 1.2 THz,(GdYbBi)3Fe5O12

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