Unidirectionally oriented nanocracks on metal surfaces irradiated by low-fluence femtosecond laser pulses

被引：15

作者：

Shimizu, Masahiro ^{[1
]}

Hashida, Masaki ^{[1
,2
]}

Miyasaka, Yasuhiro ^{[1
,2
]}

Tokita, Shigeki ^{[1
,2
]}

Sakabe, Shuji ^{[1
,2
]}

机构：

[1] Kyoto Univ, Inst Chem Res, Adv Res Ctr Beam Sci, Kyoto 6110011, Japan

[2] Kyoto Univ, Grad Sch Sci, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 17期

基金：

日本学术振兴会;

关键词：

ABLATION;

D O I：

10.1063/1.4827296

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have investigated the origin of nanostructures formed on metals by low-fluence femtosecond laser pulses. Nanoscale cracks oriented perpendicular to the incident laser polarization are induced on tungsten, molybdenum, and copper targets. The number density of the cracks increases with the number of pulses, but crack length plateaus. Electromagnetic field simulation by the finite-difference time-domain method indicates that electric field is locally enhanced along the direction perpendicular to the incident laser polarization around a nanoscale hole on the metal surface. Crack formation originates from the hole. (C) 2013 AIP Publishing LLC.

引用

页数：4

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