Current Switch by Coherent Trapping of Electrons in Quantum Dots

T. Brandes; F. Renzoni

doi:10.1103/PhysRevLett.85.4148

Current Switch by Coherent Trapping of Electrons in Quantum Dots

T. Brandes and F. Renzoni

Phys. Rev. Lett. 85, 4148 – Published 6 November 2000

Abstract

We propose a new transport mechanism through tunnel-coupled quantum dots based on the coherent population trapping effect. Coupling to an excited level by the coherent radiation of two microwaves can lead to an extremely narrow current antiresonance. The effect can be used to determine interdot dephasing rates and is a mechanism for a very sensitive, optically controlled current switch.

Received 26 April 2000

DOI:https://doi.org/10.1103/PhysRevLett.85.4148

Authors & Affiliations

T. Brandes^1,* and F. Renzoni²

¹Universität Hamburg, 1. Institut für Theoretische Physik, Jungiusstrasse 9, D-20355 Hamburg, Germany
²Universität Hamburg, Institut für Laserphysik, Jungiusstrasse 9, D-20355 Hamburg, Germany

^*Permanent address: Department of Physics, University of Manchester Institute of Science and Technology (UMIST), P.O. Box 88, Manchester M60 1QD, United Kingdom.