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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 9 — Aug. 28, 2012

Continuous wave mirrorless lasing in cholesteric liquid crystals with a pitch gradient across the cell gap

A. Muñoz, M. E. McConney, T. Kosa, P. Luchette, L. Sukhomlinova, T. J. White, T. J. Bunning, and B. Taheri  »View Author Affiliations


Optics Letters, Vol. 37, Issue 14, pp. 2904-2906 (2012)
http://dx.doi.org/10.1364/OL.37.002904


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Abstract

Despite numerous efforts, continuous wave (CW) lasing in dye doped, one-dimensional (1D) photonic bandgap cholesteric liquid crystal (CLC) structures has not been previously reported, to our knowledge. Here we report on the observation of lasing in such structures under both coherent (laser) and incoherent (LED) CW light excitation. To achieve this effect, we used a 1D-photonic bandgap structure made of a polymer stabilized CLC with a pitch gradient across the cell thickness. A spectral reflectivity profile of such a CLC structure reveals local minima in the area within a photonic stopband and close to it. The realization of lasing pumped by low power CW light sources opens the possibility of all-organic, compact, tunable CW lasers for display and medical applications.

© 2012 Optical Society of America

OCIS Codes
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(160.3710) Materials : Liquid crystals

ToC Category:
Materials

History
Original Manuscript: November 21, 2011
Revised Manuscript: March 6, 2012
Manuscript Accepted: June 14, 2012
Published: July 12, 2012

Virtual Issues
Vol. 7, Iss. 9 Virtual Journal for Biomedical Optics

Citation
A. Muñoz, M. E. McConney, T. Kosa, P. Luchette, L. Sukhomlinova, T. J. White, T. J. Bunning, and B. Taheri, "Continuous wave mirrorless lasing in cholesteric liquid crystals with a pitch gradient across the cell gap," Opt. Lett. 37, 2904-2906 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-37-14-2904


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