Femtosecond laser amorphization of tellurium

Autor:	Samuel W. Teitelbaum, Frank Y. Gao, Yu-Hsiang Cheng, Keith A. Nelson
Rok vydání:	2018
Předmět:	010302 applied physics Materials science Phonon chemistry.chemical_element Laser 01 natural sciences Molecular physics law.invention Amorphous solid chemistry law 0103 physical sciences Femtosecond Irradiation Crystallite 010306 general physics Tellurium Excitation
Zdroj:	Physical Review B. 98
ISSN:	2469-9969 2469-9950
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
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::26d279172b00a76823ef05181a69edb4 https://doi.org/10.1103/physrevb.98.134112 Zobrazit plný text záznamu