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Journal of Nanophotonics

Photonic band-edge-induced enhancement in absorption and emission
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Paper Abstract

An enhancement in photonic band-edge-induced absorption and emission from rhodamine-B dye doped polystyrene pseudo gap photonic crystals is studied. The band-edge-induced enhancement in absorption is achieved by selecting the incident angle of the excitation beam so that the absorption spectrum of the emitter overlaps the photonic band edge. The band-edge-induced enhancement in emission, on the other hand, is possible with and without an enhancement in band-edge-induced absorption, depending on the collection angle of emission. Through a simple set of measurements with suitably chosen angles for excitation and emission, we achieve a maximum enhancement of 70% in emission intensity with band-edge-induced effects over and above the intrinsic emission in the case of self-assembled opals. This is a comprehensive effort to interpret tunable lasing in opals as well as to predict the wavelength of lasing arising as a result of band-edge-induced distributed feedback effects.

Paper Details

Date Published: 27 February 2015
PDF: 9 pages
J. Nanophoton. 9(1) 093086 doi: 10.1117/1.JNP.9.093086
Published in: Journal of Nanophotonics Volume 9, Issue 1
Show Author Affiliations
Karikkuzhi Variyath Ummer, Indian Institute of Technology Kanpur (India)
Ramarao Vijaya, Indian Institute of Technology Kanpur (India)

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