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Fine Structure And Magnetooptics Of Excitonic Levels In Wurtzite GaN

Published online by Cambridge University Press:  10 February 2011

L. Eckey ,
A. Hoffmann ,
P. Thurian ,
I. Broser ,
B. K. Meyer  and
K. Hiramatsu
L. Eckey
Affiliation:
Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany
A. Hoffmann
Affiliation:
Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany
P. Thurian
Affiliation:
Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany
I. Broser
Affiliation:
Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany
B. K. Meyer
Affiliation:
I. Physikalisches Institut, Justus-Liebig-Universität, Gießen, Germany
K. Hiramatsu
Affiliation:
Mie University, Department of Electrical and Electronic Engineering, Mie, Japan
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Abstract

We present a comprehensive study of the direct photoluminescence from excitonic states in GaN using polarization-dependent and magnetooptical measurements in fields up to 15 T. We measure and identify fine-structure splittings in the states n=l and n=2 of the A-exciton. The splitting between the energy levels of longitudinal and transverse states in the A-exciton is 0.96 meV. Emission from the spin triplet exciton in the state n=l is observed. We also identify emissions from three sublevels of the state n=2 of the A-exciton. From the analysis of our data we obtain the effective-mass parameters of electrons and holes, g-values and the Rydberg energy of the A-exciton.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 482 , 1997 , 555
Copyright
Copyright © Materials Research Society 1998

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