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

Research output: Contribution to journalArticle

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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.

Original languageEnglish
Article number117118
JournalAIP Advances
Volume4
Issue number11
DOIs
Publication statusPublished - Nov 1 2014

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graphene
transient heating
augmentation
scattering
photoconductivity
energy spectra
saturation
cycles
electric fields
pulses
electrons
interactions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Hafez, H. A., Al-Naib, I., Oguri, K., Sekine, Y., Dignam, M. M., Ibrahim, A., ... Ozaki, T. (2014). Nonlinear transmission of an intense terahertz field through monolayer graphene. AIP Advances, 4(11), [117118]. https://doi.org/10.1063/1.4902096

Nonlinear transmission of an intense terahertz field through monolayer graphene. / Hafez, H. A.; Al-Naib, I.; Oguri, K.; Sekine, Y.; Dignam, M. M.; Ibrahim, A.; Cooke, D. G.; Tanaka, S.; Komori, F.; Hibino, H.; Ozaki, T.

In: AIP Advances, Vol. 4, No. 11, 117118, 01.11.2014.

Research output: Contribution to journalArticle

Hafez, HA, Al-Naib, I, Oguri, K, Sekine, Y, Dignam, MM, Ibrahim, A, Cooke, DG, Tanaka, S, Komori, F, Hibino, H & Ozaki, T 2014, 'Nonlinear transmission of an intense terahertz field through monolayer graphene', AIP Advances, vol. 4, no. 11, 117118. https://doi.org/10.1063/1.4902096
Hafez HA, Al-Naib I, Oguri K, Sekine Y, Dignam MM, Ibrahim A et al. Nonlinear transmission of an intense terahertz field through monolayer graphene. AIP Advances. 2014 Nov 1;4(11). 117118. https://doi.org/10.1063/1.4902096
Hafez, H. A. ; Al-Naib, I. ; Oguri, K. ; Sekine, Y. ; Dignam, M. M. ; Ibrahim, A. ; Cooke, D. G. ; Tanaka, S. ; Komori, F. ; Hibino, H. ; Ozaki, T. / Nonlinear transmission of an intense terahertz field through monolayer graphene. In: AIP Advances. 2014 ; Vol. 4, No. 11.
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