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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 8 — Apr. 12, 2010
  • pp: 7946–7954

Tuning quantum-dot based photonic devices with liquid crystals

Karoline A. Piegdon, Stefan Declair, Jens Förstner, Torsten Meier, Heiner Matthias, Martin Urbanski, Heinz-S. Kitzerow, Dirk Reuter, Andreas D. Wieck, Axel Lorke, and Cedrik Meier  »View Author Affiliations

Optics Express, Vol. 18, Issue 8, pp. 7946-7954 (2010)

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Microdisks made from GaAs with embedded InAs quantum dots are immersed in the liquid crystal 4-cyano-4’-pentylbiphenyl (5CB). The quantum dots serve as emitters feeding the optical modes of the photonic cavity. By changing temperature, the liquid crystal undergoes a phase transition from the isotropic to the nematic state, which can be used as an effective tuning mechanism of the photonic modes of the cavity. In the nematic state, the uniaxial electrical anisotropy of the liquid crystal molecules can be exploited for orienting the material in an electric field, thus externally controlling the birefringence of the material. Using this effect, an electric field induced tuning of the modes is achieved. Numerical simulations using the finite-differences time-domain (FDTD) technique employing an anisotropic dielectric medium allow to understand the alignment of the liquid crystal molecules on the surface of the microdisk resonator.

© 2010 Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(160.6000) Materials : Semiconductor materials
(230.5750) Optical devices : Resonators

ToC Category:

Original Manuscript: February 2, 2010
Revised Manuscript: March 15, 2010
Manuscript Accepted: March 16, 2010
Published: March 31, 2010

Karoline A. Piegdon, Stefan Declair, Jens Förstner, Torsten Meier, Heiner Matthias, Martin Urbanski, Heinz-S. Kitzerow, Dirk Reuter, Andreas D. Wieck, Axel Lorke, and Cedrik Meier, "Tuning quantum-dot based photonic devices with liquid crystals," Opt. Express 18, 7946-7954 (2010)

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