Double-peak distribution of electron and ion emission profile during femtosecond laser ablation of metals

被引：62

作者：

Amoruso, S

Wang, X

Altucci, C

de Lisio, C

Armenante, M

Bruzzese, R

Spinelli, N

Velotta, R

机构：

[1] Univ Basilicata, Dipartimento Ingn & Fis Ambiente, I-85100 Potenza, Italy

[2] Ist Nazl Fis Nucl, Sezione Napoli, I-80126 Naples, Italy

[3] Univ Basilicata, Dipartimento Chim, I-85100 Potenza, Italy

[4] Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy

[5] Univ Naples Federico II, INFM, I-80126 Naples, Italy

来源：

APPLIED SURFACE SCIENCE | 2002年 / 186卷 / 1-4期

关键词：

ultrashort laser ablation; time-of-flight technique;

D O I：

10.1016/S0169-4332(01)00679-1

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：

Femtosecond laser ablation of metals with a Ti:sapphire laser system has been investigated by a time-of-flight mass spectroscopy technique, Ion mass spectra show a double-peak distribution, evidencing the presence of a high-energy component (up to few keV). even at moderate laser intensities (10(12)-10(13) W cm(-2)). Two different ablation regimes were identified for the less energetic component, and explained in the framework of the two-temperature modeling of ultrashort laser pulse-solid target interactions. Ambipolar diffusion has been identified as the probable mechanism giving rise to the observed high-energy plasma plume component. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：358 / 363

页数：6

共 15 条

[1] Thermal and nonthermal ion emission during high-fluence femtosecond laser ablation of metallic targets [J].