Self-tuned quantum dot gain in photonic crystal lasers

Strauf, S., Hennessy, K., Rakher, M.T., Choi, Y.-S., Badolato, A. , Andreani, L.C., Hu, E.L., Petroff, P.M. and Bouwmeester, D. (2006) Self-tuned quantum dot gain in photonic crystal lasers. Physical Review Letters, 96(12), 127404. (doi: 10.1103/PhysRevLett.96.127404)

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Abstract

We demonstrate that very few (2–4) quantum dots as a gain medium are sufficient to realize a photonic-crystal laser based on a high-quality nanocavity. Photon correlation measurements show a transition from a thermal to a coherent light state proving that lasing action occurs at ultralow thresholds. Observation of lasing is unexpected since the cavity mode is in general not resonant with the discrete quantum dot states and emission at those frequencies is suppressed. In this situation, the quasicontinuous quantum dot states become crucial since they provide an energy-transfer channel into the lasing mode, effectively leading to a self-tuned resonance for the gain medium.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Badolato, Professor Antonio
Authors: Strauf, S., Hennessy, K., Rakher, M.T., Choi, Y.-S., Badolato, A., Andreani, L.C., Hu, E.L., Petroff, P.M., and Bouwmeester, D.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN:0031-9007
ISSN (Online):1079-7114

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