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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 11 — Apr. 10, 2014
  • pp: 2390–2397

Compact polarization rotator for silicon-based slot waveguide structures

Jinbiao Xiao, Yin Xu, Jiayuan Wang, and Xiaohan Sun  »View Author Affiliations

Applied Optics, Vol. 53, Issue 11, pp. 2390-2397 (2014)

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A compact polarization rotator (PR) for silicon-based slot waveguides is proposed, where the slot region including the upper claddings is filled with liquid crystals (LCs). With the anisotropic features of the LCs, the transverse field components of eigenmodes have almost identical amplitudes, leading to a high modal hybridness. As a result, the TE (TM) polarization can be rotated efficiently to the TM (TE) polarization within a short length. The numerical results show that a PR 11.3 μm in length at an operating wavelength of 1.55 μm is achieved with an extinction ratio (ER) (insertion loss) of 12.6 (0.22) dB for TE-to-TM and 11.5 (0.30) dB for TM-to-TE. Moreover, the optical bandwidth for TE-to-TM (TM-to-TE) mode must be 64(29)nm to keep the ER over 12 (10) dB. In addition, fabrication tolerances to the structural parameters are investigated, and field evolution along the propagation distance through the PR is also demonstrated.

© 2014 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(130.3120) Integrated optics : Integrated optics devices
(230.7370) Optical devices : Waveguides
(130.5440) Integrated optics : Polarization-selective devices

ToC Category:
Integrated Optics

Original Manuscript: January 7, 2014
Revised Manuscript: March 7, 2014
Manuscript Accepted: March 7, 2014
Published: April 7, 2014

Jinbiao Xiao, Yin Xu, Jiayuan Wang, and Xiaohan Sun, "Compact polarization rotator for silicon-based slot waveguide structures," Appl. Opt. 53, 2390-2397 (2014)

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