Delay times for ablation rate suppression by femtosecond laser irradiation with a two-color double-pulse beam

被引：1

作者：

Takenaka, Keisuke ^{[1
]}

Shinohara, Naoki ^{[1
]}

Hashida, Masaki ^{[2
,3
]}

Kusaba, Mitsuhiro ^{[4
]}

Sakagami, Hitoshi ^{[5
]}

Sato, Yuji ^{[6
]}

Masuno, Shin-ichiro ^{[3
,6
]}

Nagashima, Takeshi ^{[7
]}

Tsukamoto, Masahiro ^{[6
]}

机构：

[1] Osaka Univ, Grad Sch Engn, 1-1 Yamadaoka, Suita, Osaka 5650871, Japan

[2] Tokai Univ, Res Inst Sci & Technol, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 2591292, Japan

[3] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan

[4] Osaka Sangyo Univ, Dept Elect, 3-1-1 Nakagaito, Daito, Osaka 5748530, Japan

[5] Natl Inst Fus Sci, Toki, Gifu 5095292, Japan

[6] Osaka Univ, Joining & Welding Res Inst, 11-1 Mihogaoka, Ibaraki, Osaka 5670047, Japan

[7] Setsunan Univ, Fac Sci & Engn, 17-8 Ikeda Nakamachi, Neyagawa, Osaka 5728508, Japan

来源：

APPLIED PHYSICS LETTERS | 2021年 / 119卷 / 23期

关键词：

OPTICAL-PROPERTIES; ENHANCEMENT;

D O I：

10.1063/5.0073671

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigated the delay time & UDelta;t for suppressing the ablation rate of titanium with a two-color double-pulse laser beam at & UDelta;t = 0-600 ps. The double-pulse laser beam consisted of cross-polarized pulses with 150 and > 150-fs pulse widths and 800 and 400-nm wavelengths, respectively. The ablation rate was suppressed most at & UDelta;t & AP; 60 ps for a 400-nm second pulse but at & UDelta;t & AP; 200 ps for an 800-nm second pulse. This difference suggests that the ablation rate was effectively suppressed when the expanding surface plasma produced by the first pulse was near the critical density for the second pulse.

引用

页数：6

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