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Optical-Gain Measurements on GaN and Alx Ga1-xN Heterostructures

Published online by Cambridge University Press:  10 February 2011

L. Eckey ,
J. Holst ,
V. Kutzer ,
A. Hoffmann ,
I. Broser ,
O. Ambacher ,
M. Stutzmann ,
H. Amano  and
I. Akasaki
L. Eckey
Affiliation:
Technische Universität Berlin, Hardenbergstraβe 36, 10623 Berlin, Germany
J. Holst
Affiliation:
Technische Universität Berlin, Hardenbergstraβe 36, 10623 Berlin, Germany
V. Kutzer
Affiliation:
Technische Universität Berlin, Hardenbergstraβe 36, 10623 Berlin, Germany
A. Hoffmann
Affiliation:
Technische Universität Berlin, Hardenbergstraβe 36, 10623 Berlin, Germany
I. Broser
Affiliation:
Technische Universität Berlin, Hardenbergstraβe 36, 10623 Berlin, Germany
O. Ambacher
Affiliation:
Walter-Schottky-Institut, Technische Universität München, 85748 Garching, Germany
M. Stutzmann
Affiliation:
Walter-Schottky-Institut, Technische Universität München, 85748 Garching, Germany
H. Amano
Affiliation:
Meijo University, Department of Electrical and Electronical Engineering, Nagoya, Japan
I. Akasaki
Affiliation:
Meijo University, Department of Electrical and Electronical Engineering, Nagoya, Japan
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Abstract

Optical gain processes in thin GaN and AlGaN are compared by means of gain spectroscopy using the stripe length method and high-excitation photoluminescence, both performed at various densities and temperatures. We find that inelastic excitonic scattering processes and biexciton decay are important at low temperatures and low excitation densities Both materials are similar in that increasing the excitation density results in gain spectra dominated by the electron-hole plasma and phonon-assisted band-to-band recombination. These also prevail at high temperatures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 468: Symposium D – Gallium Nitride and Related Materials II , 1997 , 237
Copyright
Copyright © Materials Research Society 1997

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References

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