Ultrafast terahertz studies of dirac fermion dynamics in graphene

Hyunyong Choi; Ferenc Borondics; David A. Siegel; Shuyun Zhou; Michael C. Martin; Alessandra Lanzara; Robert A. Kaindl

doi:10.1109/ICIMW.2009.5324954

Ultrafast terahertz studies of dirac fermion dynamics in graphene

Hyunyong Choi, Ferenc Borondics, David A. Siegel, Shuyun Zhou, Michael C. Martin, Alessandra Lanzara, Robert A. Kaindl

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

1 Scopus citations

Abstract

We report the broadband optical conductivity and ultrafast carrier dynamics of few-layer graphene. Equilibrium spectra exhibit significant THz and near-IR absorption, consistent with a model of intra- and interband transitions in a dense Dirac electron plasma. Ultrafast THz transmission changes after photoexcitation are dominated by excess holes, with a 1.2-ps exponential decay that reflects minority-carrier recombination.

Original language	English (US)
Title of host publication	34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009
DOIs	https://doi.org/10.1109/ICIMW.2009.5324954
State	Published - 2009
Externally published	Yes
Event	34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009 - Busan, Korea, Republic of Duration: Sep 21 2009 → Sep 25 2009

Publication series

Name	34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009

Conference

Conference	34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009
Country/Territory	Korea, Republic of
City	Busan
Period	9/21/09 → 9/25/09

ASJC Scopus subject areas

Electrical and Electronic Engineering
Communication

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10.1109/ICIMW.2009.5324954

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Choi, H., Borondics, F., Siegel, D. A., Zhou, S., Martin, M. C., Lanzara, A., & Kaindl, R. A. (2009). Ultrafast terahertz studies of dirac fermion dynamics in graphene. In 34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009 Article 5324954 (34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009). https://doi.org/10.1109/ICIMW.2009.5324954

Ultrafast terahertz studies of dirac fermion dynamics in graphene. / Choi, Hyunyong; Borondics, Ferenc; Siegel, David A. et al.
34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009. 2009. 5324954 (34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009).

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

Choi, H, Borondics, F, Siegel, DA, Zhou, S, Martin, MC, Lanzara, A & Kaindl, RA 2009, Ultrafast terahertz studies of dirac fermion dynamics in graphene. in 34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009., 5324954, 34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009, 34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009, Busan, Korea, Republic of, 9/21/09. https://doi.org/10.1109/ICIMW.2009.5324954

Choi H, Borondics F, Siegel DA, Zhou S, Martin MC, Lanzara A et al. Ultrafast terahertz studies of dirac fermion dynamics in graphene. In 34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009. 2009. 5324954. (34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009). doi: 10.1109/ICIMW.2009.5324954

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author = "Hyunyong Choi and Ferenc Borondics and Siegel, {David A.} and Shuyun Zhou and Martin, {Michael C.} and Alessandra Lanzara and Kaindl, {Robert A.}",

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AU - Lanzara, Alessandra

AU - Kaindl, Robert A.

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AB - We report the broadband optical conductivity and ultrafast carrier dynamics of few-layer graphene. Equilibrium spectra exhibit significant THz and near-IR absorption, consistent with a model of intra- and interband transitions in a dense Dirac electron plasma. Ultrafast THz transmission changes after photoexcitation are dominated by excess holes, with a 1.2-ps exponential decay that reflects minority-carrier recombination.

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DO - 10.1109/ICIMW.2009.5324954

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BT - 34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009

T2 - 34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009

Y2 - 21 September 2009 through 25 September 2009

ER -

Ultrafast terahertz studies of dirac fermion dynamics in graphene

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