Open AccessOptimal design of two-dimensional photonic crystal polarization splitters
Author(s) -
Mingyu Li,
Ping Gu
Publication year - 2005
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.54.2358
Subject(s) - photonic crystal , grating , materials science , polarization (electrochemistry) , fabrication , yablonovite , optics , band gap , optoelectronics , rod , wavelength , photonic integrated circuit , physics , medicine , chemistry , alternative medicine , pathology
A method for designing two-dimensional photonic crystal polarization splitters is put forward. Optimal structure of a two-dimensional photonic crystal with a t riangular lattice of Ge rectanglular rods in BaF2 is presented. It is shown ho w a maximum photonic band-gap for TE mode is obtained by choosing the proper wid th of the rectangular rods. The two-dimensional bandgap for TE mode of this design is 0.083(2πc/a, here a is the period of grating). The polarization frequency band corresponds to a wavelength band ranging from 172 to 24μm, with the theoretical relative bandwidth being 33.1%. The fabrication of such a pho tonic crystal polarization splitter is an easy process based on coating films on the grating and is suitable for industrial making.