Optical decoherence and quantum beats in Cs/Cu(111)

被引：14

作者：

Ogawa, S ^{[1
]}

Nagano, H ^{[1
]}

Petek, H ^{[1
]}

机构：

[1] Hitachi Ltd, Adv Res Lab, Hatoyama, Saitama 3500395, Japan

来源：

SURFACE SCIENCE | 1999年 / 427-28卷

关键词：

adatoms; alkali metal; copper; laser method; photoelectron spectroscopy; photoemission; quantum effects; single crystal surfaces;

D O I：

10.1016/S0039-6028(99)00229-0

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：

Electron dynamics induced by optical excitation from the occupied Shockley surface state to an unoccupied state localized on Cs atoms on Cu(111) is studied by interferometric time-resolved two-photon photoemission. With near-resonant excitation, beat structures are observed in interferometric two-pulse correlation measurements, where the two-photon photoemission intensity is measured as a function of pump-probe delay time. The quantum beats that originate from the frequency differences among initial-intermediate and intermediate-final states, and the carrier frequency are reproduced qualitatively by a three-level optical Bloch equation model. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：34 / 38

页数：5

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