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High Resolution Site-Selective Studies of Erbium-Centers in GaN and GaN:Mg.

Published online by Cambridge University Press:  01 February 2011

V. Glukhanyuk ,
H. Przybylińska ,
A. Kozanecki  and
W. Jantsch
V. Glukhanyuk*
Affiliation:
Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland.
H. Przybylińska
Affiliation:
Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland.
W. Jantsch
Affiliation:
Institute of Semiconductor and Solid State Physics, Johannes Kepler University, Altenberger str. 69, A-4040 Linz, Austria.
*
1Corresponding author e-mail: [email protected], Phone: +48 22 843 66 01 3148, Fax +48 22 843 09 26
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Abstract

In this work the high resolution optical spectroscopy is used in order to determine the positions of the Stark split 4I15/2, 4I11/2 and 4I9/2 energy levels of Er3+ in GaN and GaN:Mg. Photoluminescence and photoluminescence excitation spectra were measured at energies corresponding to the 4I15/2→4I9/2 and 4I15/2→4I11/2 absorption transitions. Low Er implant doses were applied to reduce the number of possible defects. In undoped GaN only a single Er-center was observed and no influence of Mg doping on the energy level splittings of this center in GaN:Mg was found. Numerical analysis based on point charge model was used to calculate parameters of the local crystal field (CF) acting on Er3+ ions. The splittings of the 4I9/2 and 4I11/2 energy levels were calculated in weak CF approach and good agreement with experimental results was obtained. The calculations confirmed that the symmetry of the erbium center in hexagonal GaN is C3v.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 866 , 2005 , V3.10
Copyright
Copyright © Materials Research Society 2005

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