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A Comparative Study of an Inp Quantum Dot Laser and A GAxIN(1-X)P Quantum Well Laser

Published online by Cambridge University Press:  01 February 2011

Y. M. Manz  and
O. G. Schmidt
Y. M. Manz
Affiliation:
Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stutttgart, Germany
O. G. Schmidt
Affiliation:
Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stutttgart, Germany
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Abstract

A comparative study between a red-light emitting quantum dot (QD) and quantum well (QW) laser, grown in the same solid-source molcular beam epitaxy (SSMBE) machine under the same conditions, is presented. The QD laser consists of a threefold stack of 3.5 ML InP dots and the QW laser of a 4.5 nm thick compressively strained Ga30In70P layer, both embedded in a Ga52In48P waveguide. The threshold current density of the QD laser is jthr = 1.8 kA/cm2 at 300 K and more than twice as large for the QW laser. Moreover, temperature dependent analysis of spontaneous emission spectra reveals that the threshold current density of the QD device is less temperature dependent than that of the QW laser, although the linewidth of the QD samples is larger.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 722: Symposia K/L – Materials and Devices for Optoelectronics and Photonics – Photonic Crystals-From Materials to Devices , 2002 , K11.4
Copyright
Copyright © Materials Research Society 2002

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