Vengurlekar, A. S. ; Jha, S. S. (1990) Subpicosecond time-resolved reflection of ultra-fast electrical pulses from GaAs in presence of nonthermal photo excited carriers Physical Review B: Condensed Matter and Materials Physics, 41 (2). pp. 1286-1289. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v41/i2/p1286_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.41.1286
Abstract
The reflected waveform of a femtosecond electrical pulse incident on GaAs following hot-electron excitation by a subpicosecond optical pulse is calculated. Conditions under which the electrons initially relax mainly by emitting a cascade of longitudinal-optical (LO) phonons are assumed to hold. It is found that the electrical pulse can show amplification on reflection when the initial kinetic energy of the excited electrons equals an integral multiple of the LO-phonon energy within a sufficiently narrow energy spread.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 71678 |
| Deposited On: | 09 Dec 2011 05:21 |
| Last Modified: | 09 Dec 2011 05:21 |
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