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Title: Probing the Spontaneous Emission Dynamics in Si-Nanocrystals-Based Microdisk Resonators
Author: Pitanti, A.
Ghulinyan, M.
Navarro Urrios, Daniel
Pucker, G.
Pavesi, L.
Keywords: Física de partícules
Particle physics
Issue Date: 9-Mar-2010
Publisher: American Physical Society
Abstract: As a possible cavity quantum electrodynamical system, unlike III-V quantum dots, Si-NCs are not considered ideal emitters for emission rate enhancement observations (Purcell effect). Here, we report on direct measurements of spontaneous emission rate enhancement of Si-NCs embedded in a whispering-gallery mode resonator at room temperature. Using time-resolved microphotoluminescence experiments, we demonstrate important lifetime reductions ( ∼ 70 % ) for Si-NCs coupled to cavity modes with respect to uncoupled ones. Comparing experiments with the theoretical Purcell enhancement in a bad emitter regime, we estimate effective linewidths of ∼ 10     meV through which Si-NC emitters are coupled to cavity photons. Finally, our study provides an alternative method for the estimation of subnatural linewidths of quantum dots at room temperature.
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It is part of: Physical Review Letters, 2010, vol. 104, num. 10, p. 103901
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Electrònica)
Articles publicats en revistes (Institut de Nanociència i Nanotecnologia (IN2UB))

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