Microwave control of directed transport in asymmetric antidot structures
École Normale Supérieure, 45, rue d'Ulm, 75231 Paris Cedex 05, France
Corresponding author: a firstname.lastname@example.org
Published online: 31 July 2006
It is shown that a polarized microwave radiation creates directed transport in an asymmetric antidot superlattice in two dimensional electron gas. A numerical method is developed that allows to establish the dependence of this ratchet effect on several parameters relevant for real experimental studies. It is applied to the concrete case of a semidisk Galton board where the electron dynamics is chaotic in the absence of microwave driving. The obtained results show that strong currents can be reached at a relatively low microwave power. This effect opens new possibilities for microwave control of transport in asymmetric superlattices.
PACS: 05.45.Ac – Low-dimensional chaos / 05.60.-k – Transport processes / 72.40.+w – Photoconduction and photovoltaic effects
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2006