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Theoretical Studies of Electronic Intersubband Transitions in n-Type Doped Quantum Wells for Infrared Photodetector Applications
Published online by Cambridge University Press: 10 February 2011
Abstract
A self-consistent (8 × 8)-k · P model based on the Kohn-Sham density-functional formalism is used to calculate the quasi-particle wave functions and energy levels in n-type doped quantum wells. The self-energy from electron-electron, electron-impurity, and electron-phonon scattering was included in the calculation. The electronic intersubband absorption was calculated using a generalized self-consistent-field method including the vertex correction. The theoretical approach was applied to explain the variation of the intersubband transition peak energies as the temperature or the electron density is changed. Good agreement between the theory and experiment was achieved. The present theoretical model was also applied to design two-colors quantum well infrared photodetectors and was found to agree with the experimental measurements. Based on the numerical calculation, an approach to realize the three-colors infrared photodetectors in the triple-coupled quantum wells was proposed.
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- Copyright © Materials Research Society 1997