Ganichev, Sergey D. and Weiss, Dieter and Eroms, Jonathan (2017) Terahertz Electric Field Driven Electric Currents and Ratchet Effects in Graphene. ANNALEN DER PHYSIK, 529 (11): 1600406. ISSN 0003-3804, 1521-3889
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Terahertz field induced photocurrents in graphene were studied experimentally and by microscopic modeling. Currents were generated by cw and pulsed laser radiation in large area as well as small-size exfoliated graphene samples. We review general symmetry considerations leading to photocurrents depending on linear and circular polarized radiation and then present a number of situations where photocurrents were detected. Starting with the photon drag effect under oblique incidence, we proceed to the photogalvanic effect enhancement in the reststrahlen band of SiC and edge-generated currents in graphene. Ratchet effects were considered for in-plane magnetic fields and a structure inversion asymmetry as well as for graphene with non-symmetric patterned top gates. Lastly, we demonstrate that graphene can be used as a fast, broadband detector of terahertz radiation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | QUANTUM-WELLS; TOPOLOGICAL INSULATORS; TUNNELING IONIZATION; EPITAXIAL GRAPHENE; DEEP IMPURITIES; ULTRAFAST PHOTOCURRENTS; SURFACE; PHOTODETECTORS; SPECTROSCOPY; GENERATION; graphene; terahertz; photocurrents; nonlinear electron transport |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:19 |
| Last Modified: | 11 Feb 2019 15:19 |
| URI: | https://pred.uni-regensburg.de/id/eprint/1924 |
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