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Electric field effects in AlGaAs-GaAs symmetric and asymmetric coupled quantum wells

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3 Author(s)
Juang, C. ; Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA ; Kuhn, K.J. ; Darling, R.B.

A theoretical study of energy level shift and field-induced tunneling in symmetric and asymmetric coupled quantum wells is presented. Energy level shift is calculated from the time-dependent Schrodinger equation using the inverse power method. The time evolution of an electron wavepackage is shown by the application of the time-development operator of the time-independent Schrodinger equation. Energy level shift in coupled quantum wells is found to be enhanced in comparison to single quantum wells. The energy level shift in coupled quantum wells is found to be nearly linear with the applied field. Oscillation frequencies for electrons in symmetric and asymmetric coupled quantum wells are evaluated versus the applied field and compared to semiclassical prediction. Tunneling lifetimes in symmetric and asymmetric coupled quantum wells are evaluated versus the applied field

Published in:

Quantum Electronics, IEEE Journal of  (Volume:27 ,  Issue: 9 )

Date of Publication:

Sep 1991

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