title: Femtosecond Circular Photon Drag Effect in the Ag/Pd Nanocomposite.
abstract: We report on the observation of the helicity-dependent photoresponse of the 20-μm-thick silver-palladium (Ag/Pd) nanocomposite films. In the experiment, 120 fs pulses of Ti:S laser induced in the film an electric current perpendicular to the incidence plane. The photoinduced current is a linear function of the incident beam power, and its sign depends on the beam polarization and angle of incidence. In particular, the current is zero for the p- and s-polarized beams, while its sign is opposite for the right- and left-circularly polarized beams. By comparing experimental results with theoretical analysis, we show that the photoresponse of the Ag/Pd nanocomposite originates from the photon drag effect.
authors.affiliation: Institute of Mechanics UB RAS, Izhevsk, Russia, 426067.
authors.forename: Gennady M
authors.initials: GM
authors.lastname: Mikheev
authors.affiliation: Institute of Mechanics UB RAS, Izhevsk, Russia, 426067.
authors.forename: Aleksandr S
authors.initials: AS
authors.lastname: Saushin
authors.affiliation: Institute of Photonics, University of Eastern Finland, 80101, Joensuu, Finland.
authors.forename: Viatcheslav V
authors.initials: VV
authors.lastname: Vanyukov
authors.affiliation: Institute of Mechanics UB RAS, Izhevsk, Russia, 426067.
authors.forename: Konstantin G
authors.initials: KG
authors.lastname: Mikheev
authors.affiliation: Institute of Photonics, University of Eastern Finland, 80101, Joensuu, Finland. yuri.svirko@uef.fi.|Department of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia, 119991. yuri.svirko@uef.fi.
authors.forename: Yuri P
authors.initials: YP
authors.lastname: Svirko
keywords: Circular photocurrent; Circular polarization; Photon drag effect