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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 26 — Dec. 20, 2010
  • pp: 26995–27003

3D microlasers from self-assembled cholesteric liquid-crystal microdroplets

M. Humar and I. Muševič  »View Author Affiliations

Optics Express, Vol. 18, Issue 26, pp. 26995-27003 (2010)

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We demonstrate a tunable and omnidirectional microlaser in the form of a microdroplet of a dye-doped, cholesteric liquid crystal in a carrier fluid. The cholesteric forms a Bragg-onion optical microcavity and the omnidirectional 3D lasing is due to the stimulated emission of light from the dye molecules in the liquid crystal. The lasing wavelength depends solely on the natural helical period of the cholesteric and can be tuned by varying the temperature. Millions of microlasers can be formed simply by mixing a liquid crystal, a laser dye and a carrier fluid, thus providing microlasers for soft-matter photonic devices.

© 2010 Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(230.1480) Optical devices : Bragg reflectors
(160.1585) Materials : Chiral media
(140.3945) Lasers and laser optics : Microcavities
(160.5293) Materials : Photonic bandgap materials

ToC Category:
Lasers and Laser Optics

Original Manuscript: September 21, 2010
Revised Manuscript: November 11, 2010
Manuscript Accepted: November 19, 2010
Published: December 8, 2010

M. Humar and I. Muševič, "3D microlasers from self-assembled cholesteric liquid-crystal microdroplets," Opt. Express 18, 26995-27003 (2010)

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