Polarized-microwave control of directed transport in a 2D electron gas with artificial asymmetrical scatterers

The directed electron transport, driven by external linear-polarized microwave irradiation, in a two-dimensional spatially periodic asymmetrical system called “ratchet” has been studied experimentally. The broken spatial symmetry was introduced in a high mobility two-dimensional electron gas based o...

Full description

Saved in:
Bibliographic Details
Published in:Physica. E, Low-dimensional systems & nanostructures Low-dimensional systems & nanostructures, 2008-04, Vol.40 (6), p.2043-2045
Main Authors: Sassine, S., Krupko, Yu, Kvon, Z.D., Portal, J.-C., Murali, R., Martin, K.P., Hill, G., Wieck, A.D.
Format: Article
Language:English
Subjects:
Electronic transport
Nanodevices
Photogalvanic effects
Quantum ratchets
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The directed electron transport, driven by external linear-polarized microwave irradiation, in a two-dimensional spatially periodic asymmetrical system called “ratchet” has been studied experimentally. The broken spatial symmetry was introduced in a high mobility two-dimensional electron gas based on AlGaAs/GaAs heterojunction by patterning an array of artificial semidiscs-shaped scatterers (antidots). A directed electric current of few μ A was observed in the “ratchet” antidot lattice under microwave irradiation (of few μ W ) in the absence of any external current applied to the sample. The signal was recorded as a function of magnetic field, temperature, microwave power and polarization.
ISSN:1386-9477
1873-1759
DOI:10.1016/j.physe.2007.09.092