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

doi:10.1088/1674-1056/22/4/047808

Abstract 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.

Keywords: T-shape splitter Fabry–Perot nanocavity spectrally selective splitting finite difference time domain (FDTD) simulation

Received: 02 July 2012
Revised: 04 August 2012
Accepted manuscript online:

PACS:	78.68.+m	(Optical properties of surfaces)
	68.47.De	(Metallic surfaces)
	42.79.Fm	(Reflectors, beam splitters, and deflectors)

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

Corresponding Authors: Sun Xiu-Dong
E-mail: xdsun@hit.edu.cn

Cite this article:

M Afshari Bavil, Sun Xiu-Dong (孙秀冬) A compact frequency selective stop-band splitter by using Fabry–Perot nanocavity in a T-shape waveguide 2013 Chin. Phys. B 22 047808

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

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