Fan Fei, Xiong Chuan-Zhong, Chen Jie-Rong, Chang Sheng Jiang
Opt Lett. 2018 Feb 15;43(4):687-690. doi: 10.1364/OL.43.000687.
We investigated THz nonreciprocal circularly polarized transmission in thin longitudinally magnetized InSb film, especially focusing on its non-eigen nonreciprocal transmission mechanism at room temperature. Then, based on this effect, we presented a THz isolator for linear polarized waves. The nonreciprocal transmission of the InSb film in this device is converted and enhanced by a pair of orthogonal artificial birefringence gratings. After the optimization, the isolation reaches 24 dB, and the insertion loss is <0.5 dB at room temperature and a low magnetic field.
我们研究了纵向薄磁化锑化铟薄膜中的太赫兹非互易圆偏振传输，特别关注其在室温下的非本征非互易传输机制。然后，基于这种效应，我们提出了一种用于线性偏振波的太赫兹隔离器。该器件中锑化铟薄膜的非互易传输通过一对正交人工双折射光栅进行转换和增强。经过优化，在室温和低磁场下，隔离度达到24 dB，插入损耗<0.5 dB。
