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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 14 — Jul. 2, 2012
  • pp: 15853–15858

Wide tuning of SiN microring resonators by auto-realigning nematic liquid crystal

Tzyy-Jiann Wang, Shun-Chen Yang, Tien-Jung Chen, and Bo-Yu Chen  »View Author Affiliations

Optics Express, Vol. 20, Issue 14, pp. 15853-15858 (2012)

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We present wide electrical tuning of microring resonators with auto-realigned nematic liquid crystal (NLC) cladding. By applying electric field, homeotropically-aligned negative Δε NLC with non-rubbed alignment layers is auto-realigned along the microring waveguide due to the protruding of the ridge structure. The consistent cladding index distribution along the microring waveguide produces effective tuning of the resonant wavelength. It achieves a large tuning range of 13nm for TM mode and 2.1nm for TE mode. The NLC reorientation characteristics are investigated by minimizing Oseen-Frank energy. The proposed microring resonator owns the features of large tuning range and bi-polarization wavelength tuning.

© 2012 OSA

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(160.3710) Materials : Liquid crystals
(130.7408) Integrated optics : Wavelength filtering devices

ToC Category:
Integrated Optics

Original Manuscript: April 27, 2012
Revised Manuscript: June 12, 2012
Manuscript Accepted: June 18, 2012
Published: June 27, 2012

Tzyy-Jiann Wang, Shun-Chen Yang, Tien-Jung Chen, and Bo-Yu Chen, "Wide tuning of SiN microring resonators by auto-realigning nematic liquid crystal," Opt. Express 20, 15853-15858 (2012)

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