Nonreciprocal transmission of electromagnetic waves by three-layer magneto-optical mediums
Guan-Xia Yu(余观夏)1,2, Jing-Jing Fu(付晶晶)2, Wen-Wen Du(杜文文)2, Yi-Hang Lv(吕一航)2, Min Luo(骆敏)1
1 College of Science, Nanjing Forestry University, Nanjing 210037, China; 2 College of of Information Science and Technology, Nanjing Forestry University, Nanjing 210037, China
Abstract We investigate the non-reciprocal transmission properties of a three-layer structure filled with magneto-optical medium and normal medium. Based on the transfer matrix method, we deduce the total transmission coefficient for a one-dimensional (1D) structure with anisotropic mediums. When two-side layers with magneto-optical medium loaded in opposite external magnetic field, the time-reversal symmetry of transmission properties will be broken. Our numerical results show that the non-reciprocal transmission properties are influenced by external magnetic fields, incident angle, and thickness of the normal medium layer. Since the non-reciprocal properties can be easily realized and adjusted by the simple structure, such a design has potential applications in integrated circulators and isolators.
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