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Proceedings Paper

Tuning of spontaneous emission in photonic crystals by resonant energy transfer and magnetic fields
Author(s): W. Libaers; K. Baert; R. A. L. Vallée; B. Kolaric; K. Clays
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Paper Abstract

The fluorescence of emitters embedded in a photonic crystal is known to be inhibited by the presence of a photonic pseudo-gap acting in their emission range. Here we present a comparative study of the influence of the pseudo-gap on the fluorescence emission of either organic dyes or nanocrystals embedded within a photonic crystal. Our results clearly show that the optical properties of the emitters are primarily controlled by the presence of a pseudo-gap which causes inhibition of the emission in both cases, regardless of the differences in chemical composition. These findings are mainly attributed to a decrease of the number of available photonic modes for radiative decay of the emitter in a photonic crystal compared to the effective homogeneous medium. Furthermore, we show that a photonic crystal can be used to control the fluorescence energy transfer (FRET) between donor-acceptor (D-A) pairs of dyes. Finally, we show that the application of an external magnetic field can finely tune the emission characteristics of emitters with a permanent magnetic moment.

Paper Details

Date Published: 6 May 2008
PDF: 12 pages
Proc. SPIE 6989, Photonic Crystal Materials and Devices VIII, 69890N (6 May 2008); doi: 10.1117/12.780261
Show Author Affiliations
W. Libaers, Katholieke Univ. Leuven (Belgium)
K. Baert, Katholieke Univ. Leuven (Belgium)
R. A. L. Vallée, Katholieke Univ. Leuven (Belgium)
B. Kolaric, Katholieke Univ. Leuven (Belgium)
K. Clays, Katholieke Univ. Leuven (Belgium)

Published in SPIE Proceedings Vol. 6989:
Photonic Crystal Materials and Devices VIII
Richard M. De La Rue; Ceferino López; Michele Midrio; Pierre Viktorovitch, Editor(s)

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