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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 7 — Apr. 3, 2006
  • pp: 2695–2705

Distributed feedback micro-laser array: helixed liquid crystals embedded in holographically sculptured polymeric microcavities

Valentin Barna, Roberto Caputo, Antonio De Luca, Nicola Scaramuzza, Giuseppe Strangi, Carlo Versace, Cesare Umeton, Roberto Bartolino, and Gabriel Noam Price  »View Author Affiliations

Optics Express, Vol. 14, Issue 7, pp. 2695-2705 (2006)

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We report a detailed physical characterization of a novel array of organic distributed feedback microcavity lasers possessing a high ratio between the quality factor Q of the resonant cavity and its volume V. The optical microcavity was obtained by confining self-organized mesophases doped with fluorescent guest molecules into holographically patterned polymeric microchannels. The liquid crystal microchannels act as mirror-less cavity lasers, where the emitted laser light propagates along the liquid crystal helical axis behaving as Bragg resonator. This miniaturization process allows us to obtain a micro-laser array possessing an ultralow lasing threshold (25nJ/pulse) while having directional control on the lasing emission, a fine wavelength tunability and the control over the emission intensity.

© 2006 Optical Society of America

OCIS Codes
(140.3600) Lasers and laser optics : Lasers, tunable
(220.4830) Optical design and fabrication : Systems design
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Lasers and Laser Optics

Original Manuscript: February 24, 2006
Revised Manuscript: March 27, 2006
Manuscript Accepted: March 27, 2006
Published: April 3, 2006

Valentin Barna, Roberto Caputo, Antonio De Luca, Nicola Scaramuzza, Giuseppe Strangi, Carlo Versace, Cesare Umeton, Roberto Bartolino, and Gabriel Noam Price, "Distributed feedback micro-laser array: helixed liquid crystals embedded in holographically sculptured polymeric microcavities," Opt. Express 14, 2695-2705 (2006)

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