Cited by 54Graphene research and applicationsLaser-Matter Interactions and ApplicationsPlasmonic and Surface Plasmon Research

All-optical control of ultrafast photocurrents in unbiased graphene

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Obraztsov, Petr A., Kaplas, Tommi, Garnov, Sergey V., Kuwata-Gonokami, Makoto, Obraztsov, Alexander N., Svirko, Yuri P.·2014·Scientific Reports

Abstract

Graphene has recently become a unique playground for studying light-matter interaction effects in low-dimensional electronic systems. Being of strong fundamental importance, these effects also open a wide range of opportunities in photonics and optoelectronics. In particular, strong and broadband light absorption in graphene allows one to achieve high carrier densities essential for observation of nonlinear optical phenomena. Here, we make use of strong photon-drag effect to generate and optically manipulate ultrafast photocurrents in graphene at room temperature. In contrast to the recent reports on injection of photocurrents in graphene due to external or built-in electric field effects and by quantum interference, we force the massless charge carriers to move via direct transfer of linear momentum from photons of incident laser beam to excited electrons in unbiased sample. Direction and amplitude of the drag-current induced in graphene are determined by polarization, incidence angle and intensity of the obliquely incident laser beam. We also demonstrate that the irradiation of graphene with two laser beams of the same wavelength offers an opportunity to manipulate the photocurrents in time domain. The obtained all-optical control of the photocurrents opens new routes towards graphene based high-speed and broadband optoelectronic devices.

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  • Subsequent investigations with off-normal optical illumination of graphene on dielectric substrates and percolated gold films demonstrated photon-drag-induced currents and THz radiation, with built-in field and thermoelectric effects precluded in these contact-free THz emission studies.

    “Subsequent investigations with off-normal optical illumination of graphene on dielectric substrates48,244 and percolated gold films245 demonstrated photon-drag-induced currents246 and THz radiation. Built-in field and thermoelectric effects were precluded in these contact-free THz emission studies.”

    From Ultrafast terahertz emission from emerging symmetry-broken materials (2023) · cites this paper as [244]

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Authors
Obraztsov, P. A., Kaplas, T., Garnov, S. V., Kuwata-Gonokami, M., Obraztsov, A. N., & Svirko, Y. P.
Affiliations
  • University of Eastern Finland (FI)
  • Prokhorov General Physics Institute (RU)
Corresponding author
Obraztsov, Petr A.
Venue
Scientific Reports
Published
2014-02-06
Volume
4
Issue
1
Pages
4007-4007
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2039591247
Cited by
54
References
35
Citations by year
2026: 2 · 2025: 2 · 2024: 3 · 2023: 2 · 2022: 4 · 2021: 4 · 2020: 8 · 2019: 8 · 2018: 6 · 2017: 4 · 2016: 6 · 2015: 2 · 2014: 3
FWCI
2.27
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
  • Russian Foundation for Basic Research
  • Tekes
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Graphene research and applications
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
  • Physical Sciences › Engineering › Biomedical Engineering › Plasmonic and Surface Plasmon Research
Keywords
graphene, ultrafast photocurrents, photon drag effect, all-optical control, oblique laser incidence, polarization dependence, angle of incidence, optoelectronic devices, light-matter interaction

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