Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-02-21
Appl. Phys. Lett., vol. 93, 094102 (2008)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
9 pages (preprint), 3 figures
Scientific paper
10.1063/1.2977605
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 multi-exponential 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.
Forchel Alfred
Johansen Jeppe
Julsgaard Brian
Kamp Martin
Lodahl Peter
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