Open AccessMagnetically tunable magneto-photonic crystals for multifunctional terahertz polarization controller
Author(s) -
Fei Fan,
Guoqiang Zhan,
Bai Jin-Jun,
Xianghui Wang,
Shengjiang Chang
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.60.084219
Subject(s) - polarizer , terahertz radiation , polarization controller , polarization (electrochemistry) , materials science , photonic crystal , optics , optoelectronics , photonics , magnetic field , beam splitter , birefringence , plane wave expansion , physics , laser , wavelength , chemistry , fiber laser , quantum mechanics
A multifunctional terahertz polarization controller is designed based on the two-dimensional photonic crystal structure and the ferrite material. The different working devices including a controllable polarizer, a polarization beam splitter and a tunable phase retarder with continuous phase retardations of - at 1 THz are controlled by the shift of photonic band gap with different external magnetic fields. By using the plane wave expansion method and the rigorous coupled wave analysis, we calculate the band gap positions and transmittances of device with the variation of magnetic field. The field distribution and phase are simulated by the finite difference time domain method.