Uncoupled defect modes in a two-dimensional quasiperiodic photonic crystal
Optical Physics Laboratory, Institute of Physics and
Center for Condensed Matter Physics, Chinese Academy of Sciences
Beijing 100080, PRC
Accepted: 25 July 2003
The defect modes of a two-dimensional quasiperiodic photonic crystal (QPC) with defects are studied. It is found that if the defects possess the same rotational symmetry, the resonant frequencies of the defects are identical. On the other hand, uncoupled modes exist when the field symmetry of defect modes is different from that of external exciting waves. A corresponding experiment in the microwave region confirms the phenomenon.
PACS: 42.70.Qs – Photonic bandgap materials / 41.20.Jb – Electromagnetic wave propagation; radiowave propagation / 42.25.Bs – Wave propagation, transmission and absorption
© EDP Sciences, 2003