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Femtosecond investigation of electron thermalization in gold
Abstract
Electron-electron and electron-phonon thermalization processes are investigated in gold films using a high-sensitivity multiple-wavelength femtosecond pump-probe technique. A nonequilibrium electron distribution is excited by free-carrier absorption of an infrared femtosecond pulse and its relaxation dynamics followed by measuring the transient reflectivity and transmissivity with a visible probe pulse. Measurements performed in a thin gold film in the very low perturbation limit (\ensuremath{\Delta}${\mathit{T}}_{\mathit{e}}$\ensuremath{\sim}20 K) yield evidence for the existence of a non-Fermi electron distribution with an electron thermalization time of \ensuremath{\sim}500 fs and an electron-lattice interaction time of 1 ps. The apparent thermalization dynamics of the electron gas is much faster in optically thick samples and is shown to be dominated by transport effects.
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Optical Constants of the Noble Metals
Johnson, P. B., & Christy, R. W. (1972) · Physical Review B · doi:10.1103/physrevb.6.4370 · Cited by 20,094
Cited by
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Burda, C., Chen, X., Narayanan, R., & El-Sayed, M. A. (2005) · Chemical Reviews · doi:10.1021/cr030063a · Cited by 7,230
Ghosh, S. K., & Pal, T. (2007) · Chemical Reviews · doi:10.1021/cr0680282 · Cited by 2,782
Heterodyne picosecond thermoreflectance applied to nanoscale thermal metrology
Dilhaire, S., Pernot, G., Calbris, G., Rampnoux, J. M., & Grauby, S. (2011) · Journal of Applied Physics · doi:10.1063/1.3665129 · Cited by 63
Metadata
- Authors
- Sun, C.-K., Vallée, F., Acioli, L., Ippen, E. P., & Fujimoto, J. G.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 1993-10-15
- Volume
- 48
- Issue
- 16
- Pages
- 12365-12368
- ISSN
- 0163-1829 (ISSN-L)
- 1095-3795
- OpenAlex
- W2044287551
- Cited by
- 274
- References
- 1
- FWCI
- 3.44
- Type
- journal article
- Language
- en
- Open access
- closed
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- Sun, C.-K., Vallée, F., Acioli, L., Ippen, E. P., & Fujimoto, J. G. (1993). Femtosecond investigation of electron thermalization in gold. Physical Review B. https://doi.org/10.1103/physrevb.48.12365
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