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Optics Letters

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  • Vol. 23, Iss. 21 — Nov. 1, 1998
  • pp: 1707–1709

Low-threshold lasing at the edge of a photonic stop band in cholesteric liquid crystals

V. I. Kopp, B. Fan, H. K. M. Vithana, and A. Z. Genack  »View Author Affiliations


Optics Letters, Vol. 23, Issue 21, pp. 1707-1709 (1998)
http://dx.doi.org/10.1364/OL.23.001707


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Abstract

Low-threshold lasing is observed at the edge of the stop band of a one-dimensional structure—a dye-doped cholesteric liquid-crystal film. The mode closest to the edge has the lowest lasing threshold. The rates of spontaneous and stimulated emission are suppressed within the stop band and enhanced at the band edge. The ratio of right to left circularly polarized spontaneous emission is in good agreement with calculated density of photon states.

© 1998 America

OCIS Codes
(140.2050) Lasers and laser optics : Dye lasers
(230.3720) Optical devices : Liquid-crystal devices

Citation
V. I. Kopp, B. Fan, H. K. M. Vithana, and A. Z. Genack, "Low-threshold lasing at the edge of a photonic stop band in cholesteric liquid crystals," Opt. Lett. 23, 1707-1709 (1998)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-23-21-1707


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