Photonic-band-gap structures and guide modes in two-dimensional magnetic photonic crystal heterostructures
Department of Physics, Capital Normal University, Beijing 100037, P.R.
2 CCAST (World Lab.), P.O. Box 8730, Beijing 100080, P.R. China
3 Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, P.R. China
Corresponding author: a email@example.com
Published online: 2 April 2004
We first investigate the band gap structures of two-dimensional magnetic photonic crystals (MPC) composed of rectangular (square) magnetic cylinders embedded in a host dielectric material in the rectangular (square) lattice, and we then study guide modes at interface of MPC heterostructures (MPCHs) by use of plane wave expansion method in combination with supercell technique. We find that both the mirror-symmetric MPCHs and the mixed-type MPCHs composed of square cylinders in a square lattice can produce the TM guide modes even without any lattice distortions. This feature is quite different from that of the non-magnetic PC heterostructures, in which the occurrence of the guide modes requires the relatively longitudinal gliding or transverse displacement of lattices. It may provide a new way to generate guide modes and apply to the device of light wave guides.
PACS: 42.70.Qs – Photonic bandgap materials / 78.67.-n – Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures / 63.20.Pw – Localized modes / 42.79.Gn – Optical waveguides and couplers
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004