Circular terahertz ratchets in a two-dimensionally modulated Dirac system

URN to cite this document:: urn:nbn:de:bvb:355-epub-585474
DOI to cite this document:: 10.5283/epub.58547

Hild, Marcel ; Yahniuk, I. ; Golub, L. E.

; Amann, Julia ; Eroms, Jonathan

; Weiss, Dieter

; Watanabe, Kenji

; Taniguchi, Takashi ; Ganichev, S. D.

License: Creative Commons Attribution 4.0
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Date of publication of this fulltext: 28 Jun 2024 13:48

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Abstract

We report on the observation of the circular ratchet effect excited by terahertz laser radiation in a specially designed two-dimensional metamaterial consisting of a graphene monolayer deposited on a few-layer graphene gate patterned with an array of triangular antidots. We show that a periodically driven Dirac fermion system with spatial asymmetry converts the a.c. power into a d.c. current, ...