Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1999-03-11
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Submitted to Phys. Rev. B
Scientific paper
10.1103/PhysRevB.60.15937
We consider electron transport in a ballistic multi-mode channel structure in the presence of a transversely polarized far-infrared (FIR) field. The channel structure consists of a long resonance region connected to an adiabatic widening with a potential barrier at the end. At frequencies that match the mode energy separation in the resonance region we find distinct peaks in the photocurrent, caused by Rabi oscillations in the mode population. For an experimental situation in which the width of the channel is tunable via gates, we propose a method for reconstructing the spectrum of propagating modes, without having to use a tunable FIR source. With this method the change in the spectrum as the gate voltage is varied can be monitored.
Singh Ajit P.
Tageman Ola
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