Regensburg 2000 – scientific programme
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HL: Halbleiterphysik
HL 25: Quantenpunkte (optische Eigenschaften)
HL 25.7: Talk
Wednesday, March 29, 2000, 17:30–17:45, H15
All-electronic Broadband Millimeterwave Spectroscopy on a Single Quantum Dot — •H. Qin1, R. H. Blick1, J. P. Kotthaus1, D. W. van der Weide2, and W. Wegscheider3 — 1CeNS and Sektion Physik, LMU München, Geschwister-Scholl-Platz 1, 80539 München — 2Department of Electrical and Computer Engineering, University of Wisconsin, 1415 Engineering Dr, Madison, WI 53706, USA — 3Institut für Angewandte und Experimentelle Physik, Universität Regensburg, 93040 Regensburg
We perform microwave spectroscopy of a single quantum dot using a compact broadband spectrometer operating in the frequency range of 20 - 400 GHz. The quantum dot is realized in the two-dimensional electron gas of an AlGaAs/GaAs heterostructure, containing roughly 30 electrons. We probe the complex photo conductance of this dot by measuring amplitude and phase of the signal simultaneously.