Second harmonic generation in reflection from crystalline GaAs under intense picosecond laser irradiation
- 15 November 1984
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 45 (10) , 1019-1021
- https://doi.org/10.1063/1.95047
Abstract
The emission of second harmonic radiation in reflection from crystalline GaAs irradiated with 20-ps, 530-nm laser pulses has been measured for incident laser fluences far exceeding the threshold fluence Fth for permanent reflectivity changes. The results are consistent with the occurrence of surface melting during the laser pulse. Detailed analysis of the second harmonic signals reveals an upper limit of 2 ps for the structural transition associated with the melting of the surface.Keywords
This publication has 2 references indexed in Scilit:
- Pulsed-laser annealing of GaAs surface studied by time-resolved second-harmonic generation in reflectionOptics Communications, 1983
- A simple technique for individual picosecond laser pulse duration measurementsJournal of Applied Physics, 1976