Influence of composition diffusion on the band structures of InGaNAs/GaAs quantum wells investigated by the band-anticrossing model
Qiu, Y. N.
Rorison, J. M.
Dawson, M. D.
Bryce, A. C.
Date of Issue2005
School of Physical and Mathematical Sciences
We investigate the influence of quantum-well intermixing (QWI) on the electronic band structure of GaInNAs/GaAs multiquantum wells. The band structures and optical transitions have been calculated based on the band-anticrossing (BAC) model and Fick's interdiffusion law for both intermixed and nonintermixed samples, respectively. The calculated results are consistent with the true optical transitions observed by photoluminescence excitation spectroscopy and secondary ion mass spectroscopy. Our investigation indicates that BAC model is valid for interdiffused quantum wells and verifies that the QWI process in GaInNAs/GaAs multiquantum wells is induced mainly by the interdiffusion of In-Ga between the quantum wells and barriers.
DRNTU::Science::Physics::Optics and light
Applied physics letters
Applied Physics Letters © copyright 2005 American Institute of Physics. The journal's website is located at http://apl.aip.org/.