Femtosecond laser amorphization of tellurium
Journal
Physical Review B
Journal Volume
98
Journal Issue
13
ISSN
24699950
Date Issued
2018-10-24
Author(s)
Abstract
Polycrystalline tellurium becomes amorphous after irradiation with strong femtosecond pulses. The amorphization is sensitive to the initial temperature but not very sensitive to the temporal profile of the optical excitation. Above the amorphization threshold, single-shot transient reflectivity traces show clear coherent phonon oscillations within 1 ps. These results suggest that amorphization is due to thermal melting rather than nonthermal melting or switching for pump fluences up to the ablation threshold.
Type
journal article