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Mapping of Donor Impurities in Gan By Raman Imaging

Published online by Cambridge University Press:  10 February 2011

F. A. Ponce ,
J. W. Steeds ,
C. D. Dyer  and
G. D. Pitt
F. A. Ponce
Affiliation:
Xerox Palo Alto Research Center, Palo Alto, CA 94304
J. W. Steeds
Affiliation:
University of Bristol, H. H. Wills Physics Laboratory, Bristol BS8 1TL, UK
C. D. Dyer
Affiliation:
Renishaw, Old Town, Wotton-under-Edge, Gloucestershire, GL12 7DH, UK
G. D. Pitt
Affiliation:
Renishaw, Old Town, Wotton-under-Edge, Gloucestershire, GL12 7DH, UK
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Abstract

Raman scattering experiments on silicon-doped GaN show that donor impurities quench the Al(LO) Raman line at 735 cm−1. This is due to interaction between lattice vibrations and the free carrier plasma. The spatial variation of the Al(LO) signal has been imaged directly using newly developed instrumentation. Features with dimension under on micron are observed in faceted GaN crystallites. The variation in free carrier concentration is attributed to preferential incorporation of donor impurities during growth.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 449: Symposium N – III-V Nitrides , 1996 , 731
Copyright
Copyright © Materials Research Society 1997

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