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Journal of Nanophotonics

Spatial and spectral distributions of emission from dye-doped photonic crystals in reflection and transmission geometries
Author(s): Munige S. Reddy; Ramarao Vijaya; Ivan D. Rukhlenko; Malin Premaratne
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Paper Abstract

Spectral distribution of emission was measured in a large angular range (8 deg to 180 deg) around a self-assembled photonic crystal synthesized from colloids of Rhodamine-B dye-doped polystyrene. Its comparison with the emission from the same dye-doped colloids in a liquid suspension provides a better understanding of the anisotropic propagation of light within the structure due to its pseudo-gap properties. The spontaneous emission is suppressed by 40% in the presence of the stop band over a large bandwidth ~ 50%) of the first-order bandgap in the ΓL direction, due to the appropriate choice of the colloidal diameter. Spectral shifts in the spontaneous emission spectrum occur with the variation in the detection angle. The inevitable disorder in the self-assembled crystals and the resultant effect on emission was modeled by comparing the experimentally obtained reflection spectrum with the band structure calculated using the Korringa-Kohn-Rostoker method to exclude finite-size effects. Reflection and transmission are complementary because of the absence of strong absorptive effects. The extent of redistribution in the emission from a photonic crystalline environment with respect to a homogeneous emitter is significant in the spectral and spatial domains.

Paper Details

Date Published: 7 November 2012
PDF: 12 pages
J. Nanophoton. 6(1) 063526 doi: 10.1117/1.JNP.6.063526
Published in: Journal of Nanophotonics Volume 6, Issue 1
Show Author Affiliations
Munige S. Reddy, Indian Institute of Technology Bombay (India)
Ramarao Vijaya, Indian Institute of Technology Kanpur (India)
Ivan D. Rukhlenko, Monash Univ. (Australia)
Malin Premaratne, Monash Univ. (Australia)

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