Optical-pump/intense-THz-probe spectroscopy of gated graphene

H. A. Hafez; P. L. Levesque; I. Al-Naib; M. M. Dignam; X. Chai; S. Choubak; P. Desjardins; R. Martel; T. Ozaki

doi:10.1109/IRMMW-THz.2016.7758550

Optical-pump/intense-THz-probe spectroscopy of gated graphene

H. A. Hafez, P. L. Levesque, I. Al-Naib, M. M. Dignam, X. Chai, S. Choubak, P. Desjardins, R. Martel, T. Ozaki

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

We study nonlinear THz effects in photoexcited gated graphene, using optical-pump/Zwtewse-THz-probe spectroscopy. A crossover from negative to positive differential THz transmission has been observed at the lowest doping concentration when the THz field is increased. Using a simple Drude model of the graphene photoconductivity, we attributed the observed behavior to a transition from a domain in which the increase in the Drude weight dominates over the increase in the scattering rate after photoexcitation, to a domain with the opposite properties when the THz probe field is increased.

Original language	English
Title of host publication	41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016
Publisher	IEEE Computer Society
ISBN (Electronic)	9781467384858
DOIs	https://doi.org/10.1109/IRMMW-THz.2016.7758550
State	Published - 28 Nov 2016
Externally published	Yes
Event	41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 - Copenhagen, Denmark Duration: 25 Sep 2016 → 30 Sep 2016

Publication series

Name	International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
Volume	2016-November
ISSN (Print)	2162-2027
ISSN (Electronic)	2162-2035

Conference

Conference	41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016
Country/Territory	Denmark
City	Copenhagen
Period	25/09/16 → 30/09/16

Bibliographical note

Publisher Copyright:
© 2016 IEEE.

ASJC Scopus subject areas

Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1109/IRMMW-THz.2016.7758550

Cite this

Hafez, H. A., Levesque, P. L., Al-Naib, I., Dignam, M. M., Chai, X., Choubak, S., Desjardins, P., Martel, R., & Ozaki, T. (2016). Optical-pump/intense-THz-probe spectroscopy of gated graphene. In 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 Article 7758550 (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz; Vol. 2016-November). IEEE Computer Society. https://doi.org/10.1109/IRMMW-THz.2016.7758550

@inproceedings{9da6ccab32344bbface7b6c7b68eaa9f,

title = "Optical-pump/intense-THz-probe spectroscopy of gated graphene",

abstract = "We study nonlinear THz effects in photoexcited gated graphene, using optical-pump/Zwtewse-THz-probe spectroscopy. A crossover from negative to positive differential THz transmission has been observed at the lowest doping concentration when the THz field is increased. Using a simple Drude model of the graphene photoconductivity, we attributed the observed behavior to a transition from a domain in which the increase in the Drude weight dominates over the increase in the scattering rate after photoexcitation, to a domain with the opposite properties when the THz probe field is increased.",

author = "Hafez, {H. A.} and Levesque, {P. L.} and I. Al-Naib and Dignam, {M. M.} and X. Chai and S. Choubak and P. Desjardins and R. Martel and T. Ozaki",

note = "Publisher Copyright: {\textcopyright} 2016 IEEE.; 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 ; Conference date: 25-09-2016 Through 30-09-2016",

year = "2016",

month = nov,

day = "28",

doi = "10.1109/IRMMW-THz.2016.7758550",

language = "English",

series = "International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz",

publisher = "IEEE Computer Society",

booktitle = "41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016",

address = "United States",

}

Hafez, HA, Levesque, PL, Al-Naib, I, Dignam, MM, Chai, X, Choubak, S, Desjardins, P, Martel, R & Ozaki, T 2016, Optical-pump/intense-THz-probe spectroscopy of gated graphene. in 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016., 7758550, International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, vol. 2016-November, IEEE Computer Society, 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016, Copenhagen, Denmark, 25/09/16. https://doi.org/10.1109/IRMMW-THz.2016.7758550

Optical-pump/intense-THz-probe spectroscopy of gated graphene. / Hafez, H. A.; Levesque, P. L.; Al-Naib, I. et al.
41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016. IEEE Computer Society, 2016. 7758550 (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz; Vol. 2016-November).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Optical-pump/intense-THz-probe spectroscopy of gated graphene

AU - Hafez, H. A.

AU - Levesque, P. L.

AU - Al-Naib, I.

AU - Dignam, M. M.

AU - Chai, X.

AU - Choubak, S.

AU - Desjardins, P.

AU - Martel, R.

AU - Ozaki, T.

PY - 2016/11/28

Y1 - 2016/11/28

N2 - We study nonlinear THz effects in photoexcited gated graphene, using optical-pump/Zwtewse-THz-probe spectroscopy. A crossover from negative to positive differential THz transmission has been observed at the lowest doping concentration when the THz field is increased. Using a simple Drude model of the graphene photoconductivity, we attributed the observed behavior to a transition from a domain in which the increase in the Drude weight dominates over the increase in the scattering rate after photoexcitation, to a domain with the opposite properties when the THz probe field is increased.

AB - We study nonlinear THz effects in photoexcited gated graphene, using optical-pump/Zwtewse-THz-probe spectroscopy. A crossover from negative to positive differential THz transmission has been observed at the lowest doping concentration when the THz field is increased. Using a simple Drude model of the graphene photoconductivity, we attributed the observed behavior to a transition from a domain in which the increase in the Drude weight dominates over the increase in the scattering rate after photoexcitation, to a domain with the opposite properties when the THz probe field is increased.

UR - http://www.scopus.com/inward/record.url?scp=85006124367&partnerID=8YFLogxK

U2 - 10.1109/IRMMW-THz.2016.7758550

DO - 10.1109/IRMMW-THz.2016.7758550

M3 - Conference contribution

AN - SCOPUS:85006124367

T3 - International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz

BT - 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016

PB - IEEE Computer Society

T2 - 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016

Y2 - 25 September 2016 through 30 September 2016

ER -

Hafez HA, Levesque PL, Al-Naib I, Dignam MM, Chai X, Choubak S et al. Optical-pump/intense-THz-probe spectroscopy of gated graphene. In 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016. IEEE Computer Society. 2016. 7758550. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz). doi: 10.1109/IRMMW-THz.2016.7758550

Optical-pump/intense-THz-probe spectroscopy of gated graphene

Abstract

Publication series

Conference

Bibliographical note

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this