Piezoreflectance characterization of doubleftbarrier resonant tunneUng structures
نویسنده
چکیده
The piezorefiectance technique has been used to optically characterize resonant tunneling structures that utilize isolated single quantum wells. The heavyand light-hole transitions associated with the quantum wells were prominent in the spectra of samples with barrier widths ranging from 50 to 34 A. Their spect.ral positions depended not only on quantum weB and barrier thicknesses, but also significantly on the amount of carrier confinement produced by barrier height. Furthermore, variations in the magnitude of impurity transitions could be observed in the spectra of different samples.
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تاریخ انتشار 2001