Surface ablation оf aluminum and silicon by ultrashort laser pulses of variable width
- Авторы: Zayarny D.A.1, Ionin A.A.1, Kudryashov S.I.1,2,3, Makarov S.V.1,4, Kuchmizhak A.A.3,5, Vitrik O.B.3,5, Kulchin Y.N.3
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Учреждения:
- Lebedev Physical Institute
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
- Institute for Automation and Control Processes, Far Eastern Branch
- ITMO University
- Far Eastern Federal University
- Выпуск: Том 103, № 12 (2016)
- Страницы: 752-755
- Раздел: Optics and Laser Physics
- URL: https://journals.rcsi.science/0021-3640/article/view/159447
- DOI: https://doi.org/10.1134/S0021364016120158
- ID: 159447
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Аннотация
Single-shot thresholds of surface ablation of aluminum and silicon via spallative ablation by infrared (IR) and visible ultrashort laser pulses of variable width τlas (0.2–12 ps) have been measured by optical microscopy. For increasing laser pulse width τlas < 3 ps, a drastic (threefold) drop of the ablation threshold of aluminum has been observed for visible pulses compared to an almost negligible threshold variation for IR pulses. In contrast, the ablation threshold in silicon increases threefold with increasing τlas for IR pulses, while the corresponding thresholds for visible pulses remained almost constant. In aluminum, such a width-dependent decrease in ablation thresholds has been related to strongly diminished temperature gradients for pulse widths exceeding the characteristic electron-phonon thermalization time. In silicon, the observed increase in ablation thresholds has been ascribed to two-photon IR excitation, while in the visible range linear absorption of the material results in almost constant thresholds.
Об авторах
D. Zayarny
Lebedev Physical Institute
Автор, ответственный за переписку.
Email: sikudr@lebedev.ru
Россия, Leninskii pr. 53, Moscow, 119991
A. Ionin
Lebedev Physical Institute
Email: sikudr@lebedev.ru
Россия, Leninskii pr. 53, Moscow, 119991
S. Kudryashov
Lebedev Physical Institute; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute); Institute for Automation and Control Processes, Far Eastern Branch
Email: sikudr@lebedev.ru
Россия, Leninskii pr. 53, Moscow, 119991; Kashirskoe sh. 31, Moscow, 115409; Vladivostok, 690041
S. Makarov
Lebedev Physical Institute; ITMO University
Email: sikudr@lebedev.ru
Россия, Leninskii pr. 53, Moscow, 119991; Kronverkskii pr. 49, St. Petersburg, 197101
A. Kuchmizhak
Institute for Automation and Control Processes, Far Eastern Branch; Far Eastern Federal University
Email: sikudr@lebedev.ru
Россия, Vladivostok, 690041; Vladivostok, 690041
O. Vitrik
Institute for Automation and Control Processes, Far Eastern Branch; Far Eastern Federal University
Email: sikudr@lebedev.ru
Россия, Vladivostok, 690041; Vladivostok, 690041
Yu. Kulchin
Institute for Automation and Control Processes, Far Eastern Branch
Email: sikudr@lebedev.ru
Россия, Vladivostok, 690041
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