DIRECT MEASUREMENT OF NONEQUILIBRIUM ELECTRON-ENERGY DISTRIBUTIONS IN SUBPICOSECOND LASER-HEATED GOLD-FILMS

被引：447

作者：

FANN, WS ^{[1
]}

STORZ, R ^{[1
]}

TOM, HWK ^{[1
]}

BOKOR, J ^{[1
]}

机构：

[1] AT&T BELL LABS,MURRAY HILL,NJ 07974

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.68.2834

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electron-energy distribution in a gold film was measured with approximately 700 fs time-resolved photoemission spectroscopy following laser heating by a 400 fs visible laser pulse. The measured distribution can be fitted by the Fermi-Dirac function at an elevated temperature except within 800 fs of the heating pulse (time-resolution limited), when a reproducible departure is observed. As a result, the relaxation of nonequilibrium electrons was found to be inadequately described by the standard electron-phonon coupling model.

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页码：2834 / 2837

页数：4

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