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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 21 — Oct. 10, 2011
  • pp: 19836–19844

Surfactant sensing based on whispering-gallery-mode lasing in liquid-crystal microdroplets

M. Humar and I. Muševič  »View Author Affiliations


Optics Express, Vol. 19, Issue 21, pp. 19836-19844 (2011)
http://dx.doi.org/10.1364/OE.19.019836


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Abstract

Lasing of whispering-gallery modes in nematic liquid-crystal microdroplets, floating in water, is demonstrated. It is shown that millimolar concentrations of sodium dodecyl sulfate in water effect the orientation of liquid-crystal molecules in the microdroplet, which changes the lasing spectrum. The presence of targeted molecules in water can be monitored by simply measuring and recognizing the spectrum of light, lasing from a small liquid-crystal droplet in water.

© 2011 OSA

OCIS Codes
(280.1415) Remote sensing and sensors : Biological sensing and sensors
(160.1585) Materials : Chiral media
(140.3945) Lasers and laser optics : Microcavities

ToC Category:
Sensors

History
Original Manuscript: July 19, 2011
Revised Manuscript: September 4, 2011
Manuscript Accepted: September 5, 2011
Published: September 26, 2011

Virtual Issues
Vol. 6, Iss. 11 Virtual Journal for Biomedical Optics

Citation
M. Humar and I. Muševič, "Surfactant sensing based on whispering-gallery-mode lasing in liquid-crystal microdroplets," Opt. Express 19, 19836-19844 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-21-19836


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