A compact frequency selective stop-band splitter by using Fabry Perot nanocavity in a T-shaped waveguide  

作　　者：M Afshari Bavil 孙秀冬 

机构地区：[1]Department of Physics, Harbin Institute of Technology

出　　处：《Chinese Physics B》2013年第4期513-518,共6页中国物理B（英文版）

基　　金：Project supported by the National Key Basic Research Program of China (Grant No. 2013CB328702)

摘　　要：By utilizing a Fabry–Perot （FP） nanocavity adjacent to T-shaped gap waveguide ports, spectrally selective filtering is realized. When the wavelength of incident light corresponds to the resonance wavelength of the FP nanocavity, the surface plasmons are captured inside the nanocavity, and light is highly reflected from this port. The resonance wavelength is determined by using Fabry–Perot resonance condition for the nanocavity. For any desired filtering frequency the dimension of the nanocavity can be tailored. The numerical results are based on the two-dimensional finite difference time domain simulation under a perfectly matched layer absorbing boundary condition. The analytical and simulation results indicate that the proposed structure can be utilized for filtering and splitting applications.By utilizing a Fabry–Perot （FP） nanocavity adjacent to T-shaped gap waveguide ports, spectrally selective filtering is realized. When the wavelength of incident light corresponds to the resonance wavelength of the FP nanocavity, the surface plasmons are captured inside the nanocavity, and light is highly reflected from this port. The resonance wavelength is determined by using Fabry–Perot resonance condition for the nanocavity. For any desired filtering frequency the dimension of the nanocavity can be tailored. The numerical results are based on the two-dimensional finite difference time domain simulation under a perfectly matched layer absorbing boundary condition. The analytical and simulation results indicate that the proposed structure can be utilized for filtering and splitting applications.

关 键 词：T-shaped splitter Fabry–Perot nanocavity spectrally selective splitting finite difference time domain （FDTD） simulation 

分 类 号：TN814[电子电信—信息与通信工程]