Photon emission induced by tunneling electrons from a Cu(100) surface covered with porphyrin molecules

被引：23

作者：

Fujita, D

Ohgi, T

Deng, WL

Ishige, K

Okamoto, T

Yokoyama, S

Kamikado, T

Mashiko, S

机构：

[1] Natl Res Inst Met, Tsukuba, Ibaraki 3050047, Japan

[2] Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

[3] Commun Res Labs, Kobe, Hyogo 65124, Japan

来源：

SURFACE SCIENCE | 2001年 / 493卷 / 1-3期

关键词：

scanning tunneling microscopy; tunneling; copper; chemisorption;

D O I：

10.1016/S0039-6028(01)01286-9

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：

An ultrahigh-vacuum scanning tunneling microscope with an optically transparent tip was used to excite photon emission from a clean Cu(1 0 0) surface and a sub-monolayer of Cu-tetra-[3,5-di-t-butylphenyl]porphyrin (Cu-TBPP) molecules chemisorbed on a Cu(1 0 0) surface. Photons generated in a nanometer-scale area just under the tip were collected within the near-field region through the apex of the optical fiber tip. Two kinds of mechanisms for the photon emission from a Cu-TBPP/Cu(1 0 0) surface are proposed. The quantum efficiency for molecular fluorescence induced by inelastic tunneling was estimated to be similar to3 x 10(-6) photons/electron. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：702 / 707

页数：6

共 28 条

[1] LUMINESCENCE AND NONRADIATIVE ENERGY-TRANSFER TO SURFACES [J].