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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 25 — Sep. 1, 2011
  • pp: E86–E91

Emission studies in double-layered and triple-layered photonic crystal microcavities

Sunita Kedia, Ramarao Vijaya, Alok K. Ray, and Sucharita Sinha  »View Author Affiliations

Applied Optics, Vol. 50, Issue 25, pp. E86-E91 (2011)

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Three-dimensional pseudo-bandgap polystyrene photonic crystals (PhCs) fabricated by the self-assembly technique are used to design two models of microcavities, namely the double-layered and the triple-layered PhC heterostructures, to study the laser-induced emission from the embedded Rhodamine-B dye. The dye molecules in the colloids of these PhC matrices are excited with a Q-switched frequency- doubled Nd:YAG laser at 532 nm , and the emission is recorded in different directions for different input powers. The spontaneous emission of the dye gets modified due to the inhomogeneous distribution of density of states in the PhC. The Bragg crystal planes serve as reflecting cavity mirrors for the embedded gain medium, and at higher pump powers, direction-dependent spectral narrowing of the emission spectrum is clearly observed.

© 2011 Optical Society of America

OCIS Codes
(140.3380) Lasers and laser optics : Laser materials
(300.2140) Spectroscopy : Emission
(300.2530) Spectroscopy : Fluorescence, laser-induced
(300.6360) Spectroscopy : Spectroscopy, laser
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(230.5298) Optical devices : Photonic crystals

Original Manuscript: March 14, 2011
Revised Manuscript: June 22, 2011
Manuscript Accepted: June 22, 2011
Published: July 15, 2011

Sunita Kedia, Ramarao Vijaya, Alok K. Ray, and Sucharita Sinha, "Emission studies in double-layered and triple-layered photonic crystal microcavities," Appl. Opt. 50, E86-E91 (2011)

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