TITLE

X-ray diffraction and optical characterization of interdiffusion in self-assembled InAs/GaAs quantum-dot superlattices

AUTHOR(S)
Xu, S. J.; Xu, S.J.; Wang, H.; Li, Q.; Xie, M. H.; Xie, M.H.; Wang, X. C.; Fan, W. J.; Feng, S. L.
PUB. DATE
October 2000
SOURCE
Applied Physics Letters;10/2/2000, Vol. 77 Issue 14
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report on the characterization of thermally induced interdiffusion in InAs/GaAs quantum-dot superlattices with high-resolution x-ray diffraction and photoluminescence techniques. The dynamical theory is employed to simulate the measured x-ray diffraction rocking curves of the InAs/GaAs quantum-dot superlattices annealed at different temperatures. Excellent agreement between the experimental curves and the simulations is achieved when the composition, thickness, and stress variations caused by interdiffusion are taken in account. It is found that the significant In-Ga intermixing occurs even in the as-grown InAs/GaAs quantum dots. The diffusion coefficients at different temperatures are estimated. © 2000 American Institute of Physics.
ACCESSION #
4412874

 

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