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 proceedingConference contribution

1 Citation (Scopus)

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 languageEnglish
Title of host publication34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009
DOIs
Publication statusPublished - 2009 Dec 31
Event34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009 - Busan, Korea, Republic of
Duration: 2009 Sep 212009 Sep 25

Publication series

Name34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009

Other

Other34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009
CountryKorea, Republic of
CityBusan
Period09/9/2109/9/25

Fingerprint

Optical conductivity
Fermions
Photoexcitation
Electron transitions
Graphene
minority
Plasmas
Electrons

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Communication

Cite this

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 [5324954] (34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009). https://doi.org/10.1109/ICIMW.2009.5324954
Choi, Hyunyong ; Borondics, Ferenc ; Siegel, David A. ; Zhou, Shuyun ; Martin, Michael C. ; Lanzara, Alessandra ; Kaindl, Robert A. / Ultrafast terahertz studies of dirac fermion dynamics in graphene. 34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009. 2009. (34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009).
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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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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, 09/9/21. https://doi.org/10.1109/ICIMW.2009.5324954

Ultrafast terahertz studies of dirac fermion dynamics in graphene. / Choi, Hyunyong; Borondics, Ferenc; Siegel, David A.; Zhou, Shuyun; Martin, Michael C.; Lanzara, Alessandra; Kaindl, Robert A.

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 proceedingConference contribution

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T1 - Ultrafast terahertz studies of dirac fermion dynamics in graphene

AU - Choi, Hyunyong

AU - Borondics, Ferenc

AU - Siegel, David A.

AU - Zhou, Shuyun

AU - Martin, Michael C.

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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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). https://doi.org/10.1109/ICIMW.2009.5324954