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Publication # 151 |
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| 151. G. Livescu, A. M. Fox, D. A. B. Miller,
"Optical Detection of Resonant Tunneling: Measurement of Tunneling Times and Resonant
Fields" in Resonant Tunneling in Semiconductors, ed. L. L. Chang et al.
(Plenum Press, New York, 1991), 331-339. Resonant enhancement of tunneling rates of electrons in p-i-n quantum well structures is observed with the technique of picosecond pump-and-probe electroabsorption. Results compare well with recently published time-resolved photoluminescence data. When measuring resonance fields with photocurrent spectroscopy, we find that there is a small, but measurable shift between the "resonance" resonating electron states (n=1 and n=2). We explain these results in terms of electron-hole Coulomb interaction, which must be taken into account in any optical measurement. |
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