journal article·2014-11-01Open access

Nonlinear transmission of an intense terahertz field through monolayer graphene

H. A. Hafez, I. Al-Naib, K. Oguri, Y. Sekine, M. M. Dignam, A. Ibrahim, D. G. Cooke, S. Tanaka, F. Komori, H. Hibino, T. Ozaki

AIP Advances· Volume 4· Issue 11

Abstract

We report nonlinear terahertz (THz) effects in monolayer graphene, giving rise to transmission enhancement of a single-cycle THz pulse when the incident THz peak electric field is increased. This transmission enhancement is attributed to reduced photoconductivity, due to saturation effects in the field-induced current and increased intraband scattering rates arising from transient heating of electrons. We have developed a tight-binding model of the response using the length gauge interaction Hamiltonian that provides good qualitative agreement. The model fully accounts for the nonlinear response arising from the linear dispersion energy spectrum in graphene. The results reveal a strong dependence of the scattering time on the THz field, which is at the heart of the observed nonlinear response.
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Research context

OpenAlex topics: Terahertz technology and applications · Topological Materials and Phenomena · Photonic Crystals and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

INRS-EMT, Advanced Laser Light Source, INRS 1 , Varennes, Québec J3X 1S2, Canada

Department of Physics, Engineering Physics and Astronomy, Queen’s University 2 , Kingston, Ontario K7L 3N6, Canada

NTT Basic Research Laboratories, NTT Corporation 3 , Atsugi, Kanagawa 243-0198, Japan

Department of Physics, McGill University 4 , Montréal, Québec, H3A 2T8, Canada

Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University 5 , Fukuoka 819-0395, Japan

Institute for Solid State Physics, University of Tokyo 6 , Chiba, 277-8581, Japan

Funding

Research Foundation for Opto-science and Technology · Natural Sciences and Engineering Research Council of Canada (Conseil de Recherches en Sciences Naturelles et en Génie du Canada) · Ministère de l'Enseignement Supérieur, de la Recherche, de la Science et de la Technologie (MESRST)

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