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Journal Article

Electron dynamics of a single quantum dot probed with wideband millimeter-wave spectroscopy

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Blick,  R. H.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Eberl,  K.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Qin, H., Blick, R. H., van der Weide, D. W., & Eberl, K. (2002). Electron dynamics of a single quantum dot probed with wideband millimeter-wave spectroscopy. Physica E, 13(2-4), 109-113.


Cite as: https://hdl.handle.net/21.11116/0000-000E-E833-3
Abstract
We perform microwave spectroscopy on a single quantum dot using
a compact pulsed spectrometer, Although DC transport shows
strong elastic cotunneling in the Coulomb blockade regime and
inelastic tunneling in the single-electron tunneling (SET)
regime, these effects are suppressed under picosecond impulses
whose energies are commensurate with those of the dot. Instead,
under non-zero bias we find excited-state resonances in the
induced complex photoconductance as well as strong deviations
of the dot capacitance compared to equilibrium values, a
signature of the effective relaxation times of SET. (C) 2002
Elsevier Science B.V. All rights reserved.