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AB-Initio Calculations Of Second Order Optical Response Functions In Wurtzite GAN and ALN, And Their Short Period Superlattices

Published online by Cambridge University Press:  10 February 2011

Sergey N. Rashkeev ,
Walter R. L. Lambrecht  and
B. Segall
Sergey N. Rashkeev
Affiliation:
Department of Physics, Case Western Reserve University, Cleveland, OH 44106–7079
Walter R. L. Lambrecht
Affiliation:
Department of Physics, Case Western Reserve University, Cleveland, OH 44106–7079
B. Segall
Affiliation:
Department of Physics, Case Western Reserve University, Cleveland, OH 44106–7079
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Abstract

Second harmonic generation coefficients were calculated from first-principles for wurtzite GaN, AlN and the (0001) superlattices (SL) (GaN)n,(AlN)n for n = 2, 4. The effects of the LDA gap underestimate are discussed. The SLs are found to have a strongly reduced static SHG response. The frequency dependent SHG coefficients are found to be sensitive to the SL band structure and to differ significantly form a superposition of the bulk components, indicating a strong intermixing of the bands.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 482 , 1997 , 857
Copyright
Copyright © Materials Research Society 1998

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