Aluminium electron-phonon relaxation-time measurement from subpicosecond nonlinear single-photon photoelectric emission at 248 nm |
| |
Authors: | J P Girardeau-Montaut M Afif C Girardeau-Montaut S D Moustaïzis N Papadogiannis |
| |
Institution: | (1) Laboratoire de Sciences et Ingénierie des Surfaces, Université Claude Bernard-Lyon 1, 43 Bvd. du 11 Novembre 1918, F-69622 Villeurbanne Cedex, France;(2) Foundation of Research and Technology Hellas, Institute of Electronic Structure and Laser, P.O. Box 1527, GR-71110 Heraklion, Crete, Greece |
| |
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 = 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. |
| |
Keywords: | 79 60 B 79 20 Ds 42 62 Hk |
本文献已被 SpringerLink 等数据库收录! |
|