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Proceedings Paper

Design of a compact polarization splitter composed of multiple-slotted waveguide and silicon nanowire
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Paper Abstract

A polarization splitter (PS) based on a directional coupler (DC) composed of vertical multiple-slotted waveguide (MSW) and silicon nanowire is proposed and designed by using a modified three-dimensional full-vectorial beam propagation method (BPM). By utilizing the unique modal properties of the slot waveguide, the coupling of the DC in quasi-TE modes can be almost neglected, and only that in quasi-TM is considered, leading to a compact PS. Moreover, the MSW has the advantages of both strong field confinement and high birefringence, which improves the performance of the present device. The numerical results show that a PS with a length of 20.5μμm in the coupling region is achieved whose bandwidth is up to 22nm (ranged from 1.540 to 1.562μm) with the crosstalk lower than -20dB. In addition, the fabrication tolerances to the structural parameters are investigated in detail. And the evolution of the injected field along the propagation distance through the PS is also demonstrated.

Paper Details

Date Published: 14 March 2013
PDF: 12 pages
Proc. SPIE 8619, Physics and Simulation of Optoelectronic Devices XXI, 86191U (14 March 2013); doi: 10.1117/12.2000625
Show Author Affiliations
Jiayuan Wang, Southeast Univ. (China)
Jinbiao Xiao, Southeast Univ. (China)
Xiaohan Sun, Southeast Univ. (China)

Published in SPIE Proceedings Vol. 8619:
Physics and Simulation of Optoelectronic Devices XXI
Bernd Witzigmann; Marek Osinski; Fritz Henneberger; Yasuhiko Arakawa, Editor(s)

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