Hot-electron blast induced by ultrashort-pulsed lasers in layered media

Femtosecond laser heating on metals produces a blasting force in the sub-picosecond domain, which exerts on the metal lattices along with the non-equilibrium heat flow from hot electrons. Such a hot-electron blast depends on both temperature and temperature gradient in the electron gas, resulting in...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2002-07, Vol.45 (16), p.3369-3382
Main Authors: Tzou, D.Y., Chen, J.K., Beraun, J.E.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron and ion emission by liquids and solids
impact phenomena
Exact sciences and technology
Impact phenomena (including electron spectra and sputtering)
Laser-beam impact phenomena
Physics
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Summary:Femtosecond laser heating on metals produces a blasting force in the sub-picosecond domain, which exerts on the metal lattices along with the non-equilibrium heat flow from hot electrons. Such a hot-electron blast depends on both temperature and temperature gradient in the electron gas, resulting in pronounced effects in multi-layered metal films due to discontinuous heat transfer and load transmission across the interface. This work employs the parabolic two-step model to study the effect of the hot-electron blast in multi-layered thin metal films. Dominating physical parameters are identified to characterize the ultrafast heating and deformation across the interface.
ISSN:0017-9310
1879-2189
DOI:10.1016/S0017-9310(02)00053-4