| Issue |
EPL
Volume 78, Number 5, June 2007
|
|
|---|---|---|
| Article Number | 57001 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/78/57001 | |
| Published online | 11 May 2007 | |
Nonequilibrium charge dynamics of light-driven rings threaded by a magnetic flux
1
Max-Planck-Institut für Mikrostrukturphysik - Weinberg 2, 06120 Halle, Germany
2
Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Nanotechnikum-Weinberg, Heinrich-Damerow-St. 4, 06120 Halle, Germany
3
Institute for Theoretical Physics,University of Regensburg - 93040 Regensburg, Germany
Received:
16
January
2007
Accepted:
13
April
2007
We study theoretically the charge polarization and the charge current dynamics of a mesoscopic ring driven by short asymmetric electromagnetic pulses and threaded by an external static magnetic flux. It is shown that the pulse-induced charge polarization and the associated light emission is controllable by tuning the external magnetic flux. Applying two mutually perpendicular pulses triggers a charge current in the ring. The interplay between this nonequilibrium and the persistent currents is investigated and the conditions under which the pulses stop the persistent current are identified.
PACS: 73.23.-b – Electronic transport in mesoscopic systems / 73.23.Ra – Persistent currents / 42.65.Re – Ultrafast processes; optical pulse generation and pulse compression
© Europhysics Letters Association, 2007
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