title: Helicity-Driven Ratchet Effect Enhanced by Plasmons.
abstract: We demonstrate that the ratchet effect-a radiation-induced direct current in periodically modulated structures with built-in asymmetry-is dramatically enhanced in the vicinity of the plasmonic resonances and has a nontrivial polarization dependence. For a circular polarization, the current component, perpendicular to the modulation direction, changes sign with the inversion of the radiation helicity. In the high-mobility structures, this component might increase by several orders of magnitude due to the plasmonic effects and exceed the current component in the modulation direction. Our theory also predicts that in the dirty systems, where the plasma resonances are suppressed, the ratchet current is controlled by the Maxwell relaxation.
authors.affiliation: A.F. Ioffe Physical Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia.|St. Petersburg State Polytechnic University, 29 Polytechnicheskaja, St. Petersburg 195251, Russia.
authors.forename: I V
authors.initials: IV
authors.lastname: Rozhansky
authors.affiliation: A.F. Ioffe Physical Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia.|Center for Integrated Electronics, Rensselaer Polytechnic Institute, 110, 8th Street, Troy, New York 12180, USA.
authors.forename: V Yu
authors.initials: VY
authors.lastname: Kachorovskii
authors.affiliation: Center for Integrated Electronics, Rensselaer Polytechnic Institute, 110, 8th Street, Troy, New York 12180, USA.
authors.forename: M S
authors.initials: MS
authors.lastname: Shur