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Ultrafast Optical-Pump Terahertz-Probe Spectroscopy of the Carrier Relaxation and Recombination Dynamics in Epitaxial Graphene
Open accessAbstract
The ultrafast relaxation and recombination dynamics of photogenerated electrons and holes in epitaxial graphene are studied using optical-pump terahertz-probe spectroscopy. The conductivity in graphene at terahertz frequencies depends on the carrier concentration as well as the carrier distribution in energy. Time-resolved studies of the conductivity can therefore be used to probe the dynamics associated with carrier intraband relaxation and interband recombination. We report the electron-hole recombination times in epitaxial graphene for the first time. Our results show that carrier cooling occurs on subpicosecond time scales and that interband recombination times are carrier density dependent.
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Cites
Two-dimensional gas of massless Dirac fermions in graphene
Novoselov, K. S., Geim, A. K., Morozov, S. V., Jiang, D., Katsnelson, M. I., Grigorieva, I. V., Dubonos, S. V., & Firsov, A. A. (2005) · Nature · doi:10.1038/nature04233 · Cited by 21,611
Experimental observation of the quantum Hall effect and Berry's phase in graphene
Zhang, Y., Tan, Y.-W., Stormer, H. L., & Kim, P. (2005) · Nature · doi:10.1038/nature04235 · Cited by 13,435
Cited by
Carrier dynamics in semiconductors studied with time-resolved terahertz spectroscopy
Ulbricht, R., Hendry, E., Shan, J., Heinz, T. F., & Bonn, M. (2011) · Reviews of Modern Physics · doi:10.1103/revmodphys.83.543 · Cited by 1,293
Tutorial: An introduction to terahertz time domain spectroscopy (THz-TDS)
Neu, J., & Schmuttenmaer, C. A. (2018) · Journal of Applied Physics · doi:10.1063/1.5047659 · Cited by 675
A Review of the Terahertz Conductivity of Bulk and Nano-Materials
Lloyd-Hughes, J., & Jeon, T.-I. (2012) · Journal of Infrared, Millimeter, and Terahertz Waves · doi:10.1007/s10762-012-9905-y · Cited by 503
Snapshots of non-equilibrium Dirac carrier distributions in graphene
Gierz, I., Petersen, J. C., Mitrano, M., Cacho, C., Turcu, I. C. E., Springate, E., Stöhr, A., Köhler, A., Starke, U., & Cavalleri, A. (2013) · Nature Materials · doi:10.1038/nmat3757 · Cited by 485
Baxter, J. B., & Guglietta, G. W. (2011) · Analytical Chemistry · doi:10.1021/ac200907z · Cited by 477
Metadata
- Authors
- George, P. A., Strait, J., Dawlaty, J., Shivaraman, S., Chandrashekhar, M., Rana, F., & Spencer, M. G.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2008-11-07
- Volume
- 8
- Issue
- 12
- Pages
- 4248-4251
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2130161371
- Cited by
- 686
- References
- 2
- FWCI
- 14.15
- Type
- journal article
- Language
- en
- Open access
- green
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- The paper
- George, P. A., Strait, J., Dawlaty, J., Shivaraman, S., Chandrashekhar, M., Rana, F., & Spencer, M. G. (2008). Ultrafast Optical-Pump Terahertz-Probe Spectroscopy of the Carrier Relaxation and Recombination Dynamics in Epitaxial Graphene. Nano Letters. https://doi.org/10.1021/nl8019399
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