FEMTOSECOND THERMOREFLECTIVITY AND THERMOTRANSMISSIVITY OF POLYCRYSTALLINE AND SINGLE-CRYSTALLINE GOLD-FILMS

被引：188

作者：

ELSAYEDALI, HE ^{[1
]}

JUHASZ, T ^{[1
]}

SMITH, GO ^{[1
]}

BRON, WE ^{[1
]}

机构：

[1] UNIV CALIF IRVINE, DEPT PHYS, IRVINE, CA 92717 USA

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.43.4488

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A femtosecond laser is used to generate and probe hot electrons in polycrystalline and single-crystalline thin gold films. Transient thermoreflectivity and thermotransmissivity measurements are performed. The hot-electron energy-loss lifetime is shown to be 1-3 ps and increases with laser fluence. For film thicknesses comparable to the optical skin depth, the lifetime for polycrystalline films is slightly shorter than that for single-crystalline films. For thicker films, hot-electron transport competes with energy loss. Electron transport appears to be slower in the polycrystalline films.

引用

页码：4488 / 4491

页数：4

共 23 条

[1] THEORY OF THERMAL RELAXATION OF ELECTRONS IN METALS [J].