Zusammenfassung
The quantum-confined Stark shift (QCSS) of the ground and the first
excited electron energy states in single Si/SiO2 quantum wells is
calculated, The QCSS for the ground state is always negative (blue),
while the QCSS for the first excited state is positive, in general, but
it can turn out to be negative when the electric field intensity becomes
high enough. A remarkable reduction (similar to 50%) of the Stark
shifts is obtained when the existence of nonabrupt interfaces as thin as
10 Angstrom is taken into account. The nonabrupt interfaces can also
change the sign of the Stark shift in the case of the excited states.
(C) 1999 Academic Press.
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