Polarization-independent Fabry-Perot interferometer in a hole-type silicon photonic crystal.
We propose and numerically demonstrate a polarization-independent Fabry-Perot interferometer (PI-FPI) based on the self-collimation effect in a hole-type silicon photonic crystal (PhC). By use of the polarization peak matching method, a resonance frequency of the transverse-electric modes can equal that of the transverse-magnetic modes in the PI-FPI, although the transmission spectra are quite polarization dependent due to birefringence of the PhC. For the operating wavelength of 1550 nm, the PI free spectral range of the PI-FPI is up to 32.3 nm, which nearly covers the whole optical communication C-band window. With its small dimensions, simple structure, and silicon-based material, this PI-FPI may play an important role in photonic integrated circuits.
Department of Physics and Electronic Information Engineering, Minjiang University, Fuzhou 350108, China. chenxy2628@yahoo.com.cn
Xiyao
X
Chen
Deyin
D
Zhao
Zexuan
Z
Qiang
Guimin
G
Lin
Hui
H
Li
Yishen
Y
Qiu
Weidong
W
Zhou