Femtosecond laser amorphization of tellurium

Autor: Samuel W. Teitelbaum, Frank Y. Gao, Yu-Hsiang Cheng, Keith A. Nelson
Rok vydání: 2018
Předmět:
Zdroj: Physical Review B. 98
ISSN: 2469-9969
2469-9950
DOI: 10.1103/physrevb.98.134112
Popis: 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.
Databáze: OpenAIRE