CONTINUOUS SECONDARY LIGHT-EMISSION FROM SILVER FILMS - ON THE ORIGIN OF THE INELASTIC BACKGROUND IN SERS

被引：18

作者：

AKEMANN, W

OTTO, A

机构：

[1] Lehrstuhl für Oberfldchenwissenschaft (IPkM)

来源：

SURFACE SCIENCE | 1994年 / 307卷

关键词：

D O I：

10.1016/0039-6028(94)91542-3

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：

When cryocondensed silver films at 40 K are excited by laser photons in the optical energy range, a broad distribution of secondary photons with an energy shift from 250 cm-1 to beyond 3500 cm-1 is emitted. Upon annealing to 250 K we observe a narrowing of the emission band accompanied by an order of magnitude increase of the peak emission intensity. The emission is quenched by oxygen exposure. The data are explained by a second order light scattering process involving surface state intraband excitations. Tentatively, the excitation band is assigned to the intrinsic surface state at (111) facets.

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收藏

页码：1071 / 1075

页数：5

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