Effect of hot electron kinetics on self-reflectivity of warm dense gold irradiated with femtosecond laser pulses
SCIE
SCOPUS
- Title
- Effect of hot electron kinetics on self-reflectivity of warm dense gold irradiated with femtosecond laser pulses
- Authors
- Kim M.; Jung J.H.; Yang S.H.; Cho M.S.; Kang G.; Lee G.; LEE, JONG-WON; Lee S.; Sohn J.; Cho B.I.
- Date Issued
- 2021-09
- Publisher
- Elsevier BV
- Abstract
- Above the damage threshold of Au nanofoil, experimental and theoretical investigations of the fluence-dependent self-reflection of intense femtosecond laser pulses are presented. Measured reflectance shows not only the fluence-dependency, but also the laser pulse duration dependency, which is barely described by the calculation of dielectric function of high-temperature Au, based on the traditional two-temperature model. A simple hot electron kinetic model, which contains a nonthermalized electronic subsystem cooperated with the two-temperature model, is considered to determine transient electron densities and temperature to calculate the dielectric functions and self-reflection of femtosecond laser pulses. Comparison to experimental data shows the effect of hot electrons with a relaxation time of a few hundreds of femtoseconds on the transient optical properties of gold under a strong excitation.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/109201
- DOI
- 10.1016/j.apsusc.2021.150073
- ISSN
- 0169-4332
- Article Type
- Article
- Citation
- Applied Surface Science, vol. 561, 2021-09
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- There are no files associated with this item.
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