Extended measurement of crater depths for aluminum and copper at high irradiances by nanosecond visible laser pulses

被引：22

作者：

Gojani, Ardian B. ^{[1
]}

Yoh, Jack J. ^{[1
]}

Yoo, Jong H. ^{[2
]}

机构：

[1] Seoul Natl Univ, Sch Mech & Aerosp Engn, Seoul 151744, South Korea

[2] Appl Spectra Inc, Fremont, CA 94538 USA

来源：

APPLIED SURFACE SCIENCE | 2008年 / 255卷 / 05期

关键词：

Laser; Ablation; Phase explosion; Plasma; Shock wave;

D O I：

10.1016/j.apsusc.2008.08.031

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effects of high power laser on aluminum and copper targets are investigated experimentally. Shadowgraph imagining is used to observe the expulsion of the material, plasma-plume formation and shock wave generation. Confocal microscopy is used for crater depth analysis, which showed that two distinctive regimes exist. At irradiances lower than 10(11) W/cm(2) the crater depth increases monotonically with the increase of irradiation. At higher irradiances, crater depth of aluminum reaches a limit value while in the case of copper, the crater depth decreases between 10(11) and 2 x 10(12) W/cm(2), and then increases again. The present results clarify the effect of plasma shielding on limiting crater depths by providing first time measurements for metals at high irradiance regime. (C) 2008 Elsevier B. V. All rights reserved.

引用

页码：2777 / 2781

页数：5

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