ISSN:
1432-0630
Keywords:
PACS: 79.60.Bm; 79.20.Ds; 42.62.Hk
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract . The sensitivity of photoelectric emission of polycrystalline aluminium, produced by 248 nm laser pulses with p-polarization and 450 fs duration, under incidence angles θ=74–86 °, has been measured. A nonlinear increase of photoemission efficiency, as a function of the incident laser peak intensity in the range of 1–50 GW/cm2, was displayed, which confirms earlier observations with gold and tungsten. This nonlinearity is consecutive to the non-thermal distribution of electron gas of laser-heated metal on the time scale of the electron–phonon relaxation time. Analysis of experimental data, using the model previously developed by us [1], gives a value of electron–phonon relaxation time ≈0.55±0.11 ps.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01568079
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