Open AccessA compact and tunable photonic crystal switch based on defect resonance
Author(s) -
吴芳芳,
沈义峰,
王永春,
韩奎,
周杰,
张园,
陈琼
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.017801
Subject(s) - finite difference time domain method , photonic crystal , waveguide , resonance (particle physics) , optics , materials science , refractive index , photonics , transmission (telecommunications) , optoelectronics , plane wave expansion , physics , telecommunications , particle physics , computer science
The transmission characteristics of a 2D photonic crystal waveguide with point defects were investigated by the plane wave expansion method (PWM) and finite difference time domain (FDTD) method. It was found that by introducing two resonant cavities (point defects) in the photonic crystal waveguide, light waves near the resonance frequencies can be totally reflected back to the waveguide. Since the resonance frequencies change with the variation of the refractive index of point defects, this phenomenon may be used to design a tunable optical switch.