Title :
Design of a compact photonic-crystal-based polarizing beam splitter
Author :
Tao Liu ; Zakharian, A.R. ; Fallahi, M. ; Moloney, J.V. ; Mansuripur, M.
Author_Institution :
Opt. Sci. Center, Univ. of Arizona, Tucson, AZ, USA
fDate :
7/1/2005 12:00:00 AM
Abstract :
A compact polarizing beam splitter based on a photonic crystal (PC) directional coupler with a triangular lattice of air holes is designed and simulated. In the employed PC structure, transverse-electric (TE) light is confined with the photonic bandgap effect, while transverse-magnetic (TM) light is guided through an index-like effect. Due to the different guiding mechanisms, TM and TE light have strikingly different beat lengths, which is utilized to separate the two polarizations in a directional coupler no longer than 24.2 μm. The two-dimensional finite-difference time-domain method of computation is used to evaluate the device performance. The extinction ratios are found to be around 20 dB for both TE and TM polarized light.
Keywords :
finite difference time-domain analysis; integrated optics; light polarisation; optical beam splitters; optical design techniques; optical directional couplers; photonic band gap; photonic crystals; TE polarized light; TM polarized light; air holes; beam splitter design; compact beam splitter; directional coupler; extinction ratios; index-like effect; photonic bandgap effect; photonic crystal; polarizing beam splitter; transverse-electric light; transverse-magnetic light; triangular lattice; two-dimensional finite-difference time-domain method; Directional couplers; Lattices; Optical devices; Optical interferometry; Optical polarization; Optical propagation; Optical waveguides; Photonic band gap; Photonic crystals; Tellurium; Optical waveguides; photonic crystals (PCs); polarizing beam splitters (PBSs);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.848278
