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Proceedings Paper

VCSELs with optically controlled current confinement: experiments and analysis
Author(s): Sven Bader; Philipp Gerlach; Rainer Michalzik
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Paper Abstract

We have devised a novel oxide-free and regrowth-free approach for optically controlled current confinement in vertical-cavity surface-emitting lasers (VCSELs). This is realized with a monolithically integrated phototransistor (PT), which is configured as an optical switch and embedded between the two Bragg reflectors. We have fabricated functional PT-VCSELs by one-step epitaxial growth plus metal deposition with different top contact sizes. We present light–current–voltage characteristics of the lasers as well as a simple theoretical model explaining the occurrence of a distinct turn-on point and clarify epitaxial design requirements to reach strong optically controlled current confinement.

Paper Details

Date Published: 28 April 2016
PDF: 6 pages
Proc. SPIE 9892, Semiconductor Lasers and Laser Dynamics VII, 989208 (28 April 2016); doi: 10.1117/12.2228090
Show Author Affiliations
Sven Bader, Univ. Ulm (Germany)
Philipp Gerlach, Philips GmbH U-L-M Photonics (Germany)
Rainer Michalzik, Univ. Ulm (Germany)


Published in SPIE Proceedings Vol. 9892:
Semiconductor Lasers and Laser Dynamics VII
Krassimir Panajotov; Marc Sciamanna; Angel Valle; Rainer Michalzik, Editor(s)

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