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Dynamic Filamentation and Beam Quality of Quantum-Dot Lasers

Gehrig, E, Hess, O, Ribbat, C, Sellin, R L and Bimberg, D (2004) Dynamic Filamentation and Beam Quality of Quantum-Dot Lasers Applied Physics Letters, 84 (10). ISSN 00036951

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Abstract

We present a comparative study of numerical simulations and experiments on the spatiotemporal dynamics and emission characteristics of quantum-well and quantum-dot lasers of identical structure. They show that, in the quantum-dot laser, the strong localization of carrier inversion and the small amplitude-phase coupling enable a significant improvement of beam quality compared to quantum-well lasers of identical geometry. Near-field profiles and beam quality (M-2) parameters calculated on the basis of time-dependent effective Maxwell-Bloch equations into which the physical properties of the active media are included via space-dependent material parameters, effective time constants, and matrix elements are fully confirmed by experimental measurements. Together they indicate that, in the quantum-dot laser, the strong localization of carrier inversion and the small amplitude-phase coupling enable a significant improvement of beam quality compared with quantum-well lasers of identical geometry. (C) 2004 American Institute of Physics.

Item Type: Article
Additional Information: Published in <i>Applied Physics Letters,</i> Vol. 84, Iss. 10. Copyright 2004 American Institute of Physics. Click <a href=http://apl.aip.org/>here</a> to access the journal's webpage.
Divisions: Faculty of Engineering and Physical Sciences > Physics
Depositing User: Mr Adam Field
Date Deposited: 27 May 2010 14:06
Last Modified: 23 Sep 2013 18:26
URI: http://epubs.surrey.ac.uk/id/eprint/129

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