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Dynamic Hall Effect Driven by Circularly Polarized Light in a Graphene Layer

J. Karch ; P. Olbrich ; M. Schmalzbauer ; C. Zoth ; C. Brinsteiner ; M. Fehrenbacher ; U. Wurstbauer ; M. M. Glazov ; S. A. Tarasenko ; E. L. Ivchenko ; D. Weiss ; J. Eroms ; R. Yakimova ; Samuel Lara-Avila (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; Sergey Kubatkin (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; S. D. Ganichev
Physical Review Letters (0031-9007). Vol. 105 (2010), 22,
[Artikel, refereegranskad vetenskaplig]

We report the observation of the circular ac Hall effect where the current is solely driven by the crossed ac electric and magnetic fields of circularly polarized radiation. Illuminating an unbiased monolayer sheet of graphene with circularly polarized terahertz radiation at room temperature generates-under oblique incidence-an electric current perpendicular to the plane of incidence, whose sign is reversed by switching the radiation helicity. Alike the classical dc Hall effect, the voltage is caused by crossed E and B fields which are, however rotating with the light's frequency.

Nyckelord: photon drag

Denna post skapades 2010-12-27. Senast ändrad 2015-10-22.
CPL Pubid: 131823


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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik



Chalmers infrastruktur