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Proceedings Paper

Design of a compact polarization rotator for silicon-based slot waveguides
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Paper Abstract

A design scheme of compact polarization rotator (PR) for silicon-based slot waveguides is proposed, where the slot including the upper claddings is filled with liquid crystals (LCs). With this design, the transverse field components of eigenmodes supported by the slot waveguides have almost identical amplitudes due to the anisotropic features of the LCs, leading to a high modal hybridness, which plays a pivotal role in designing an efficient PR. As a consequence, the input TE (TM) mode can be converted efficiently to the TM (TE) mode at the output port within a short length. The numerical results show that a PR of 11.3m in length at the operating wavelength of 1.55m is achieved with the extinction ratio and insertion loss of 12.6 (11.5) dB and 0.22 (0.30) dB, for TE-to-TM (TM-to-TE) conversion, respectively. Moreover, field evolution along the propagation distance through the PR is also demonstrated.

Paper Details

Date Published: 21 August 2014
PDF: 6 pages
Proc. SPIE 9233, International Symposium on Photonics and Optoelectronics 2014, 923322 (21 August 2014); doi: 10.1117/12.2066807
Show Author Affiliations
Yin Xu, Southeast Univ. (China)
Jiayuan Wang, Southeast Univ. (China)
Jinbiao Xiao, Southeast Univ. (China)
Xiaohan Sun, Southeast Univ. (China)


Published in SPIE Proceedings Vol. 9233:
International Symposium on Photonics and Optoelectronics 2014
Zhiping Zhou, Editor(s)

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