13 May 2015 Terahertz isolator in asymmetry magneto-metasurface
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Abstract
In this paper, we have reviewed our research on terahertz (THz) isolators and nonreciprocal transmission devices. In addition, we present a new kind of THz isolator based on asymmetry magneto-metasurface. A structured InSb layer coats on the silica substrate in which the numerical simulation shows that this metasurface has isolation over 60dB at 0.646 THz and a 10dB operating bandwidth of 13 GHz under an external magnetic field of 0.3T with an insertion loss less than 2.5dB. This kind of low-loss, high isolation, easy coupling THz magneto-metasurface isolator has broadly potentials for THz application systems. Importantly, we discuss and conclude the necessary conditions of forming THz nonreciprocal transmission in the magneto-material devices, which is strongly related with magneto-material and asymmetric transmission system.
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Sai Chen, Fei Fan, Pengfei Wu, Bo Liu, Shengjiang Chang, "Terahertz isolator in asymmetry magneto-metasurface", Proc. SPIE 9483, Terahertz Physics, Devices, and Systems IX: Advanced Applications in Industry and Defense, 948302 (13 May 2015); doi: 10.1117/12.2176787; https://doi.org/10.1117/12.2176787
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