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Aluminium electron-phonon relaxation-time measurement from subpicosecond nonlinear single-photon photoelectric emission at 248 nm

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Abstract

The sensitivity of photoelectric emission of polycrystalline aluminium, produced by 248 nm laser pulses with p-polarization and 450 fs duration, under incidence anglesθ = 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.

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Authors and Affiliations

  1. Laboratoire de Sciences et Ingénierie des Surfaces, Université Claude Bernard-Lyon 1, 43 Bvd. du 11 Novembre 1918, F-69622, Villeurbanne Cedex, France

    J. P. Girardeau-Montaut, M. Afif, C. Girardeau-Montaut & S. D. Moustaïzis

  2. Foundation of Research and Technology Hellas, Institute of Electronic Structure and Laser, P.O. Box 1527, GR-71110, Heraklion, Crete, Greece

    N. Papadogiannis

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  1. J. P. Girardeau-Montaut
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  2. M. Afif
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  3. C. Girardeau-Montaut
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  4. S. D. Moustaïzis
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  5. N. Papadogiannis
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Girardeau-Montaut, J.P., Afif, M., Girardeau-Montaut, C. et al. Aluminium electron-phonon relaxation-time measurement from subpicosecond nonlinear single-photon photoelectric emission at 248 nm. Appl. Phys. A 62, 3–6 (1996). https://doi.org/10.1007/BF01568079

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