Browsing by Author "LU, MF"

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ORIENTATION DEPENDENCE OF COHERENT HOLE OSCILLATIONS IN GAAS/ALGAAS COUPLED QUANTUM-WELLS
(1995-07-01)
CHANG, CY
;
LU, MF
;
CHEN, PA
;
JUANG, C
;
電控工程研究所
Coherent hole tunneling dynamics in GaAs/AlGaAs coupled quantum wells (CQWs) based on (100)- and (111)-oriented GaAs substrates are investigated. The tunneling probability of the hole wave packet for a heavy-hole to heavy-hole (HH-HH) band and a light-hole to Light-hole (LH-LH) band is described based on the results of a time-dependent analysis. It is demonstrated that the CQW HH-HH oscillation frequency on (100) substrates is larger than that on (111) substrates due to a significantly lighter in-plane effective mass. However, the LH-LH spatial tunneling oscillation frequency on (100) substrates is smaller than that on (111) substrates.