1. Lattice dynamics of femtosecond laser-excited antimony.
- Author
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Abdel-Fattah, Mahmoud Hanafy, Bugayev, Aleksey, and Elsayed-Ali, Hani E.
- Subjects
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LATTICE dynamics , *FEMTOSECOND lasers , *ANTIMONY films , *ELECTRON diffraction , *COMPRESSION loads , *HARMONIC oscillators - Abstract
Ultrafast electron diffraction is used to probe the lattice dynamics of femtosecond laser-excited antimony thin film. The temporal hierarchies of the intensity and position of diffraction orders are monitored. The femtosecond laser excitation of antimony film was found to lead to initial compression after the laser pulse, which gives way to tension vibrating at new equilibrium displacement. A damped harmonic oscillator model, in which the hot electron-blast force contributes to the driving force of oscillations in lattice spacing, is used to interpret the data. The electron–phonon energy-exchange rate and the electronic Grüneisen parameter were obtained. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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