| Kuo Zhou,Jun-bo Yang,Jian-kun Yang,Xiu-jian Li,Hui Jia,Ju Liu,De-bin Zou,Jia Xu,Jia-li Liao,Wen-jun Yi.A novel polarizer based on directional coupler and surface plasmon polaritons[J].Optoelectronics Letters,2013,9(6):430-433 |
| A novel polarizer based on directional coupler and surface plasmon polaritons |
| Author Name | Affiliation | E-mail | | Kuo Zhou | College of Science, National University of Defense Technology, Changsha, 410073, China | | | Jun-bo Yang | College of Science, National University of Defense Technology, Changsha, 410073, China | yangjunbo008@sohu.com | | Jian-kun Yang | College of Science, National University of Defense Technology, Changsha, 410073, China | | | Xiu-jian Li | College of Science, National University of Defense Technology, Changsha, 410073, China | | | Hui Jia | College of Science, National University of Defense Technology, Changsha, 410073, China | | | Ju Liu | College of Science, National University of Defense Technology, Changsha, 410073, China | | | De-bin Zou | College of Science, National University of Defense Technology, Changsha, 410073, China | | | Jia Xu | College of Science, National University of Defense Technology, Changsha, 410073, China | | | Jia-li Liao | College of Science, National University of Defense Technology, Changsha, 410073, China | | | Wen-jun Yi | College of Science, National University of Defense Technology, Changsha, 410073, China | |
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| Abstract: |
| A novel polarizer with a silver nanoribbon added into a traditional waveguide directional coupler is designed to realize the polarized output of TE mode. A high extinction ratio can be obtained because of the selectivity of surface plasmon polaritons (SPPs) on polarization. The effects of the polarizer parameters on coupling efficiency and extinction ratio are discussed. Simulation results indicate that the coupling efficiency for TE mode can reach about 95%, but only 3% for TM mode, with the extinction ratio of TE mode about 15 dB when the light wavelength is 1550 nm. The polarizer may have potential applications in photonic integrated circuits and quantum information technology. |
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| This work has been supported by the National Natural Science Foundation of China （Nos.60907003, 61070040 and 61107005）, and the Program for New Century Excellent Talents in University. |
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