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Proceedings Paper

Optimization of low threshold currents in proton implanted vertical cavity surface emitting lasers
Author(s): Hong-Dong Zhao; Mei Sun; Qi Liu; Wei Wang; Hui-Li Liu; Wen-Chao Li
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Paper Abstract

This paper presents a simulation analysis for the threshold characteristics of proton implanted vertical-cavity surfaceemitting lasers(VCSELs) with the aid of optical-electrical-thermal-gain model. The equations for potential, the carrier density, optical transverse mode and thermal field are given. The distributions of injected current, the fundamental transverse mode, carrier and temperature for VCSELs at various aperture radii of 1,2,4 and 6 microns are studied selfconsistently. The threshold injected currents versus the current aperture radii are obtained. The calculated results show that decreasing aperture sizes is an effective method to drop the threshold currents only when the current radii are larger than 2 micron. On the other hand, the threshold currents with the decrease of aperture radii for too small sizes of current aperture. The current aperture radius for low threshold proton implanted VCSEL is found. The threshold currents may drop with improving the confinement of current, while too much small current apertures also damage the threshold. The reason that few VCSEL with smaller aperture radii realize to operate is explained.

Paper Details

Date Published: 12 November 2010
PDF: 6 pages
Proc. SPIE 7844, Semiconductor Lasers and Applications IV, 78441E (12 November 2010); doi: 10.1117/12.868297
Show Author Affiliations
Hong-Dong Zhao, Hebei Univ. of Technology (China)
Mei Sun, Hebei Univ. of Technology (China)
Qi Liu, Hebei Univ. of Technology (China)
Wei Wang, Hebei Univ. of Technology (China)
Hui-Li Liu, Hebei Univ. of Technology (China)
Wen-Chao Li, Hebei Univ. of Technology (China)

Published in SPIE Proceedings Vol. 7844:
Semiconductor Lasers and Applications IV
Ning-Hua Zhu; Jinmin Li; Farzin Amzajerdian; Hiroyuki Suzuki, Editor(s)

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