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High Faraday effect of antiferromagnetic/ion-crystal photonic crystals in far infrared region

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2 Author(s)
Wang, Xuan-Zhang ; Key Laboratory for Photonic and Electronic Band-gap Materials, China Ministry of Education and School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China ; Zhao, Yan

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The Faraday effect of one-dimensional antiferromagnetic/ion-crystal photonic crystals (AF/IC PCs) is investigated. In numerical calculation, AF layers are FeF2 and IC layers are of IV-VI semiconductor. A valuable geometry with higher Faraday effect is found, where an incident electromagnetic wave normally illuminates the lateral surface of such a PC and the external field and AF anisotropy axis both are pointed along the wave-vector. From the numerical results based on several relevant PCs, we conclude that the FeF2/PbSe PC possesses the highest Faraday effect. Although the effect originates from AF layers and is influenced by the PC anisotropy, the rotation angle is the largest at a finite AF filling ratio (fa=0.6), reaching 22.5°μm-1 and about 20 times that of FeF2. We also discuss the wave attenuation in the PCs, and consequently find that the attenuation is lower and the transmission is better in this geometry.

Published in:

Journal of Applied Physics  (Volume:113 ,  Issue: 2 )