Open AccessEffect of rotating cavities on the group velocities of the coupled-resonater optical waveguides
Author(s) -
Jianxin Zhang,
Qu Dao-Kuan,
Shuai Feng,
Yiquan Wang,
ChuanKui Wang
Publication year - 2009
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.58.8339
Subject(s) - physics , resonator , optics , rotation (mathematics) , waveguide , scattering , group velocity , photonic crystal , lattice (music) , square lattice , optical cavity , symmetry (geometry) , condensed matter physics , geometry , acoustics , mathematics , ising model , laser
In this articlethe influence of cavity rotation on the group velocities of the coupled-resonator optical waveguideswhich consists of the two-dimensional square-lattice photonic crystalis studied theoretically by the multiple-scattering method and the finite-difference time-domain method. Simulation results show that the original single propagation mode becomes two modes when the cavities within the waveguide are rotated alternatelyand the group velocities of the modes is reduced greatly. When the rotated angle of the selected cavities is 45°the group velocities of the propagating modes can be reduced by one order of magnitude. Compared with that of the coupled-resonator optical waveguide without rotation of selected cavitiesthe two velocities get their minimum valuewhich are 0.0016c and 0.0009c respectively. The difference between them is determined by the symmetry of the propagating modes.