Open AccessIntegration of a photonic crystal polarization beam splitter and waveguide bend
Author(s) -
Wanhua Zheng,
Mingxin Xing,
Gang Ren,
Steven G. Johnson,
Wenjun Zhou,
Wei Chen,
Lianghui Chen
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.008657
Subject(s) - photonic integrated circuit , finite difference time domain method , optics , photonic crystal , beam splitter , materials science , transverse mode , polarization (electrochemistry) , waveguide , splitter , optoelectronics , extinction ratio , photonics , integrated circuit , physics , wavelength , laser , chemistry
In this work, we present the design of an integrated photonic-crystal polarization beam splitter (PC-PBS) and a low-loss photonic-crystal 60 degrees waveguide bend. Firstly, the modal properties of the PC-PBS and the mechanism of the low-loss waveguide bend are investigated by the two-dimensional finite-difference time-domain (FDTD) method, and then the integration of the two devices is studied. It shows that, although the individual devices perform well separately, the performance of the integrated circuit is poor due to the multi-mode property of the PC-PBS. By introducing deformed airhole structures, a single-mode PC-PBS is proposed, which significantly enhance the performance of the circuit with the extinction ratios remaining above 20 dB for both transverse-electric (TE) and transverse-magnetic (TM) polarizations. Both the specific result and the general idea of integration design are promising in the photonic crystal integrated circuits in the future.