TITLE

Decay dynamics of quantum dots influenced by the local density of optical states of two-dimensional photonic crystal membranes

AUTHOR(S)
Julsgaard, B.; Johansen, J.; Stobbe, S.; Stolberg-Rohr, T.; Sünner, T.; Kamp, M.; Forchel, A.; Lodahl, P.
PUB. DATE
September 2008
SOURCE
Applied Physics Letters;9/1/2008, Vol. 93 Issue 9, p094102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have performed time-resolved spectroscopy on InAs quantum dot ensembles in photonic crystal membranes. The influence of the photonic crystal is investigated by varying the lattice constant systematically. We observe a strong slow down of the quantum dots’ spontaneous emission rates as the two-dimensional bandgap is tuned through their emission frequencies. The measured band edges are in full agreement with theoretical predictions. We characterize the multiexponential decay curves by their mean decay time and find enhancement of the spontaneous emission at the bandgap edges and strong inhibition inside the bandgap in good agreement with local density of states calculations.
ACCESSION #
34360723

 

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