6 May 2008 Tuning of spontaneous emission in photonic crystals by resonant energy transfer and magnetic fields
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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.
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W. Libaers, W. Libaers, K. Baert, K. Baert, R. A. L. Vallée, R. A. L. Vallée, B. Kolaric, B. Kolaric, K. Clays, K. Clays, } "Tuning of spontaneous emission in photonic crystals by resonant energy transfer and magnetic fields", Proc. SPIE 6989, Photonic Crystal Materials and Devices VIII, 69890N (6 May 2008); doi: 10.1117/12.780261; https://doi.org/10.1117/12.780261
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