Hybrid plasmon waveguide leveraging Bloch surface polaritons for sub-wavelength confinement  

作　　者：WAN YuHang ZHENG Zheng SHI XiaoGang BIAN YuSheng LIU JianSheng 

机构地区：[1]School of Electronic and Information Engineering,Beihang University [2]School of Instrument and Science and Optic-electronic Engineering,Beihang University

出　　处：《Chinese Science Bulletin》2013年第7期567-572,共6页

基　　金：supported by the National Basic Research of China ("973" Project) (Grant No. 2009CB930702);the National Natural Science Foundation of China (Grant Nos. 61205078,61221061)

摘　　要：A novel hybrid plasmonic waveguide based on a guided Bloch surface polariton structure is proposed and investigated.This hybrid waveguide overcomes the weak confinement in the Bloch surface polariton structure caused by the diffraction limitation.By introducing a metal stripe near the dielectric ridge located on the periodic multilayer structure that is designed to support a TM polarized Bloch surface polariton,a sub-wavelength scale electric field confinement is realized.The coupling of the Bloch surface polariton and the surface plasmon polariton results in a strong field distribution within the gap between the metal stripe and the dielectric ridge.The variation of the characteristic of the hybrid mode is revealed via tuning the height of the ridge and the coupling distance.Sub-wavelength scale mode size is realized as well as a propagation length of about 100μm.A novel hybrid plasmonic waveguide based on a guided Bloch surface polariton structure is proposed and investigated. This hybrid waveguide overcomes the weak confinement in the Bloch surface polariton structure caused by the diffraction limita- tion. By introducing a metal stripe near the dielectric ridge located on the periodic multilayer structure that is designed to sup- port a TM polarized Bloch surface polariton, a sub-wavelength scale electric field confinement is realized. The coupling of the Bloch surface polariton and the surface plasmon polariton results in a strong field distribution within the gap between the metal stripe and the dielectric ridge. The variation of the characteristic of the hybrid mode is revealed via tuning the height of the ridge and the coupling distance. Sub-wavelength scale mode size is realized as well as a propagation length of about i 00 ~tm.

关 键 词：等离子体波导 表面极化子 混合模式 波长 等离激元 表面等离子体激元 极化结构 金属条带 

分 类 号：TN814[电子电信—信息与通信工程] O471.3[理学—半导体物理]