Generation of THz transients in FeCo/graphene nanobilayers by femtosecond laser pulses

I. Komissarov,G. Chen,J. Cheng,L. Gladczuk,P. Przyslupski,M. M. Mikhalik,N. G. Kovalchuk, L. Dronina,S. L. Prischepa,A. L. Danilyuk,A. Laszcz, S. Heidtfeld,R. Adam,C. M. Schneider,M. Mikulics,H. Hardtdegen,Roman Sobolewski

2021 46TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ)（2021）

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摘要

We demonstrate generation of time-resolved THz transients in a FeCo/graphene nanobilayer, excited by femtosecond optical laser pulses. The signal sign dependency on the experimental geometry and the external magnetic field allows assigning the mechanism of the THz radiation to the inverse spin Hall effect with a spin-to-charge current conversation parameter of the order of 0.001 nm.

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关键词

femtosecond optical laser pulses,external magnetic field,THz radiation,nanobilayers,time-resolved THz transients,inverse spin Hall effect,spin-charge current conversation parameter,FeCo-C

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