Femtosecond Circular Photon Drag Effect in the Ag/Pd Nanocomposite
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CitationMikheev Gennady M. Saushin Aleksandr S. Vanyukov Viatcheslav V. Mikheev Konstantin G. Svirko Yuri P. (2017). Femtosecond Circular Photon Drag Effect in the Ag/Pd Nanocomposite. Nanoscale Research Letters, 12 (1) , 1-7. 10.1186/s11671-016-1771-4.
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.