An experimental study on the bandwidth and tunability of MSP-based one-way transmission |
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| Authors: | Zhen Li Rui-xin Wu Yin Poo Qing-bo Li Rong-juan Liu Zhi-yuan Li |
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| Institution: | 1. School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China
2. Laboratory of Optical Physics, National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing, 10190, China
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| Abstract: | We studied how the constitution parameters and applied bias magnetic field influence the bandwidth and frequency tunability of the one-way transmission (OWT) caused by magnetic surface plasmon resonance of the magnetic photonic crystals (MPC). We found that wide-band OWT could be obtained using ferrite rods with larger normalized radius and suppressing the bulk modes of MPC in the frequencies where the edge and bulk modes coexist. We verified that bias magnetic field tunes the frequencies of OWT but has little effects on its bandwidth by experiments, and a simple way is proposed to suppress the bulk modes by introducing air defect near the edge of the MPC and experimentally demonstrated its effectiveness. This work provides a way toward practical applications for wide-band tunable one-way devices. |
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