Title :
Defect modes of a two-dimensional photonic crystal in the presence of acoustic wave
Author_Institution :
Dept. of Quantum Radiophys., Taras Shevchenko Nat. Univ. of Kyiv, Kiev, Ukraine
Abstract :
Defect modes of a photonic crystal modulated by propagating acoustic wave are investigated using supercell plane-wave expansion method. It is show that as a result of dielectric permittivity modulation resonant frequencies of defect modes change harmonically in time with the same frequency as the acoustic wave. Modulation level is larger for low-frequency acoustic wave and decrease with increasing frequency of sound due to spatial averaging of dielectric permittivity changes in defect region.
Keywords :
acoustic wave propagation; crystal defects; optical modulation; permittivity; photonic crystals; acoustic wave propagation; defect modes; dielectric permittivity modulation; low-frequency acoustic wave; resonant frequencies; sound frequency; spatial averaging; supercell plane-wave expansion method; two-dimensional photonic crystal; Acoustic waves; Dielectrics; Frequency modulation; Permittivity; Photonic crystals;
Conference_Titel :
Advanced Optoelectronics and Lasers (CAOL), 2013 International Conference on
Conference_Location :
Sudak
Print_ISBN :
978-1-4799-0016-9
DOI :
10.1109/CAOL.2013.6657523
