Carrier transport in the sub-picosecond regime is considered. Special attention is paid to the development of the proper equations required at this timescale, along with the difficulties imposed by many-body effects for high carrier density.
R. O. Grondin,
D. K. Ferry,
H. L. Grubin,
"Subpicosecond Hot Electron Transport", Proc. SPIE 0439, Picosecond Optoelectronics, (28 November 1983); doi: 10.1117/12.966067; https://doi.org/10.1117/12.966067