Nanomodification of gold surface by picosecond soft x-ray laser pulse

被引：45

作者：

Norman, Genri ^{[1
,2
]}

Starikov, Sergey ^{[1
,2
]}

Stegailov, Vladimir ^{[1
,2
]}

Fortov, Vladimir ^{[1
,2
]}

Skobelev, Igor ^{[1
]}

Pikuz, Tatyana ^{[1
,3
]}

Faenov, Anatoly ^{[1
,3
]}

Tamotsu, Sataoshi ^{[4
]}

Kato, Yoshiaki ^{[5
]}

Ishino, Masahiko ^{[3
]}

Tanaka, Momoko ^{[3
]}

Hasegawa, Noboru ^{[3
]}

Nishikino, Masaharu ^{[3
]}

Ohba, Toshiuki ^{[3
]}

Kaihori, Takeshi ^{[3
]}

Ochi, Yoshihiro ^{[3
]}

Imazono, Takashi ^{[3
]}

Fukuda, Yuji ^{[3
]}

Kando, Masaki ^{[3
]}

Kawachi, Tetsuya ^{[3
]}

机构：

[1] Russian Acad Sci, Joint Inst High Temp, Moscow 125412, Russia

[2] Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Russia

[3] Japan Atom Energy Agcy, Quantum Beam Sci Directorate, Kyoto 6190215, Japan

[4] Nara Womens Univ, Grad Sch Humanities & Sci, Nara 6308506, Japan

[5] Creat New Photon Ind, Grad Sch, Hamamatsu, Shizuoka 4311202, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2012年 / 112卷 / 01期

关键词：

ABLATION; SEMICONDUCTORS; EXPLOSION; STABILITY; METALS; RANGE; NM;

D O I：

10.1063/1.4731752

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We show experimentally the possibility of nanostructuring (about 20 nm) of gold surface by picosecond soft x-ray single pulse with low fluence of similar to 20 mJ/cm(2). The nanometer-scale changes of the surface structure are due to the splash of molten gold under fluence gradient of the laser beam. In addition, the ablation process occurs at slightly higher fluence of similar to 50 mJ/cm(2). The atomistic model of ablation is developed which reveals that the low threshold fluence of this process is due to the build-up of the high electron pressure and the comparatively low electron-ion energy relaxation rate in gold. The calculated ablation depths as a function of the irradiation fluence are in good agreement with the experimental data measured for gold surface modification with ultra-short duration soft x-ray and visible lasers. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4731752]

引用

页数：8

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