Femtosecond laser amorphization of tellurium

Yu Hsiang Cheng; Samuel W. Teitelbaum; Frank Y. Gao; Keith A. Nelson

doi:10.1103/PhysRevB.98.134112

Femtosecond laser amorphization of tellurium

Yu Hsiang Cheng, Samuel W. Teitelbaum, Frank Y. Gao, Keith A. Nelson

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

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.

Original language	English (US)
Article number	134112
Journal	Physical Review B
Volume	98
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevB.98.134112
State	Published - Oct 24 2018
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.98.134112

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title = "Femtosecond laser amorphization of tellurium",

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.",

author = "Cheng, {Yu Hsiang} and Teitelbaum, {Samuel W.} and Gao, {Frank Y.} and Nelson, {Keith A.}",

note = "Funding Information: This work was supported by National Science Foundation Grant No. 1665383 and by Office of Naval Research Grant No. N00014-12-1-0530. Funding Information: This work was supported by National Science Foundation Grant No. 1665383 and by Office of Naval Research Grant No. N00014-12-1-0530. Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

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doi = "10.1103/PhysRevB.98.134112",

language = "English (US)",

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T1 - Femtosecond laser amorphization of tellurium

AU - Cheng, Yu Hsiang

AU - Teitelbaum, Samuel W.

AU - Gao, Frank Y.

AU - Nelson, Keith A.

N1 - Funding Information: This work was supported by National Science Foundation Grant No. 1665383 and by Office of Naval Research Grant No. N00014-12-1-0530. Funding Information: This work was supported by National Science Foundation Grant No. 1665383 and by Office of Naval Research Grant No. N00014-12-1-0530. Publisher Copyright: © 2018 American Physical Society.

PY - 2018/10/24

Y1 - 2018/10/24

N2 - 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.

AB - 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.

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Femtosecond laser amorphization of tellurium

Abstract

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