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Temperature dependence studies of Er optical centers in GaN epilayers grown by MOCVD

Published online by Cambridge University Press:  16 January 2017

V. X. Ho
Affiliation:
Department of Physics & Center for Soft Matter and Biological Physics, Virginia Tech, Blacksburg, Virginia 24061, U.S.A.
S. P. Dail
Affiliation:
Department of Physics & Center for Soft Matter and Biological Physics, Virginia Tech, Blacksburg, Virginia 24061, U.S.A.
T. V. Dao
Affiliation:
Department of Physics & Center for Soft Matter and Biological Physics, Virginia Tech, Blacksburg, Virginia 24061, U.S.A.
H. X. Jiang
Affiliation:
Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409, U.S.A.
J. Y. Lin
Affiliation:
Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409, U.S.A.
J. M. Zavada
Affiliation:
Department of Electrical and Computer Engineering, New York University, Brooklyn, New York 11201, U.S.A.
N. Q. Vinh*
Affiliation:
Department of Physics & Center for Soft Matter and Biological Physics, Virginia Tech, Blacksburg, Virginia 24061, U.S.A.
*
*(Email: Vinh@vt.edu)
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Abstract

We report the temperature dependence of Er optical centers in GaN epilayers prepared by metal-organic chemical vapor deposition under the resonant excitation (4 I 15/24 I 9/2) excitation using a Ti:Sapphire laser (λexc = 809 nm). High resolution infrared spectroscopy and temperature dependence measurements of photoluminescence intensity from Er ions in GaN have been performed to identify the crystal filed splitting of the first excited state, 4 I 13/2. Here, we have employed a simple approach to determine activation energies which are related to the thermal population of electrons from the lowest level to the higher level of the crystal field splitting of the first excited state.

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Articles
Copyright
Copyright © Materials Research Society 2017 

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References

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