%A M Afshari Bavil, Sun Xiu-Dong (孙秀冬) %T A compact frequency selective stop-band splitter by using Fabry–Perot nanocavity in a T-shape waveguide %0 Journal Article %D 2013 %J Chin. Phys. B %R 10.1088/1674-1056/22/4/047808 %P 47808-047808 %V 22 %N 4 %U {https://cpb.iphy.ac.cn/CN/abstract/article_114701.shtml} %8 2013-03-01 %X By utlizing Fabry-Perot (FP) nanocavity adjacent to T-shape 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 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.