Document Type
Article
Publication Date
1993
DOI
10.1103/PhysRevB.48.15488
Publication Title
Physical Review B
Volume
48
Issue
20
Pages
15488-15491
Abstract
The transport of femtosecond-laser-excited nonequilibrium electrons across polycrystalline and single-crystalline gold films has been investigated through time-of-flight measurements. The thicknesses of the films range from 25 to 400 nm. Ballistic electrons as well as electrons interacting with other electrons and/or with the lattice have been observed. The ballistic component dominates the transport in the thinner films, whereas the interactive transport mechanism is dominant at the upper end of the thickness range. A slower effective velocity of the interactive component is observed in the polycrystalline samples, and is assumed to arise from the presence of grain boundaries. The reflection coefficient of excited electrons at the grain boundaries is extracted from the experiment and is estimated to be r=0.12. The experiment also suggests that thermal equilibrium among the excited electrons is not fully established in the first 500 fs after excitation. © 1993 The American Physical Society.
Original Publication Citation
Juhasz, T., Elsayed-Ali, H. E., Smith, G. O., Suãrez, C., & Bron, W. E. (1993). Direct measurements of the transport of nonequilibrium electrons in gold films with different crystal structures. Physical Review B, 48(20), 15488-15491. doi:10.1103/PhysRevB.48.15488
Repository Citation
Juhasz, T.; Elsayed-Ali, H. E.; Smith, G. O.; Suárez, C.; and Bron, W. E., "Direct Measurements of the Transport of Nonequilibrium Electrons in Gold Films with Different Crystal Structures" (1993). Electrical & Computer Engineering Faculty Publications. 118.
https://digitalcommons.odu.edu/ece_fac_pubs/118