Dielectric function of warm dense gold

被引：17

作者：

Ping, Y. ^{[1
]}

Hanson, D. ^{[2
]}

Koslow, I. ^{[2
]}

Ogitsu, T. ^{[1
]}

Prendergast, D. ^{[3
]}

Schwegler, E. ^{[1
]}

Collins, G. ^{[1
]}

Ng, A. ^{[1
,2
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[2] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V5Z 1M9, Canada

[3] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

来源：

PHYSICS OF PLASMAS | 2008年 / 15卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1063/1.2844365

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Single-state measurements of the broadband (450-800 nm) dielectric function of gold using a supercontinuum probe are reviewed. These measurements have demonstrated the first evidence of the existence of band structure in ultrathin gold foils isochorically heated by a femtosecond laser pulse to energy densities of 10(6)-10(7) J/kg. The Drude component of the dielectric function increases with energy density while the interband component shows both enhancement and redshift. Ab initio molecular-dynamics calculations based on thermalized electrons cannot reproduce the experimental results, suggesting a non-Fermi distribution of excited electrons. (C) 2008 American Institute of Physics.

引用

页数：7

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