In:
physica status solidi c, Wiley, Vol. 6, No. 2 ( 2009-02), p. 568-571
Abstract:
Detailed experimental and theoretical investigations on coherence properties of high‐ β (In,Ga)As/GaAs quantum dot‐based microcavity lasers are presented. Power dependent micro‐photoluminescence measurements on the fundamental mode of the studied micropillar cavities exhibited a smooth transition from spontaneous into stimulated emission with a strong linewidth narrowing around the onset of lasing. This is accompanied by a steep increase in the coherence time of the fundamental mode emission, as derived from first‐order field correlation measurements which revealed a gradual change in the g (1) ( τ ) lineshapes from Gaussian‐like to more exponential. In addition, systematic coherence time measurements on various micropillars demonstrated that devices with smaller spontaneous emission coupling factor β reveal longer coherence time of the lasing emission. All experimental results are fully verified by an enhanced microscopic theory which describes the lasing properties of quantum dot (QD) micropillars. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Type of Medium:
Online Resource
ISSN:
1862-6351
,
1610-1642
DOI:
10.1002/pssc.200880332
Language:
English
Publisher:
Wiley
Publication Date:
2009
detail.hit.zdb_id:
2105580-4
detail.hit.zdb_id:
2102966-0
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