Tip-enhanced Raman scattering: Influence of the tip-surface geometry on optical resonance and enhancement

被引：116

作者：

Pettinger, Bruno ^{[1
]}

Domke, Katrin F. ^{[2
]}

Zhang, Dai ^{[3
]}

Picardi, Gennaro ^{[4
]}

Schuster, Rolf ^{[5
]}

机构：

[1] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

[2] FOM, AMOLF, NL-1098 SJ Amsterdam, Netherlands

[3] Univ Tubingen, Inst Phys & Theoret Chem, D-72076 Tubingen, Germany

[4] Ecole Polytech, LPICM, F-91128 Palaiseau, France

[5] Univ Karlsruhe, Inst Phys Chem, D-76131 Karlsruhe, Germany

来源：

SURFACE SCIENCE | 2009年 / 603卷 / 10-12期

关键词：

Tip-enhanced Raman spectroscopy; Influence of the tip-surface geometry on optical resonance and enhancement; Scanning tunneling microscopy; Vibrations of adsorbed molecules; Single crystal surfaces; SCANNING TUNNELING MICROSCOPE; NANOSCALE CHEMICAL-ANALYSIS; LIGHT-EMISSION; PHOTON-EMISSION; GOLD SURFACES; FIELD ENHANCEMENT; METAL-SURFACES; PLASMON MODES; SPECTROSCOPY; RESOLUTION;

D O I：

10.1016/j.susc.2008.08.033

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：

The tip-sample distance (z) dependence of tip-enhanced Raman scattering (TERS) has been investigated. The intensities of both, the Raman lines and the broad TERS background, exhibit strong decays with increasing z, which are nearly complete within 10 nm withdrawal of the STM tip in z direction. Interestingly, the maximum of the broad Lorentzian-shaped TER background is substantially blue shifted in energy with z. This effect is ascribed to a corresponding blue shift of the energies of localized plasmon modes upon tip retraction. Both experimental results fit very well data of a simple theoretical near-field model. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1335 / 1341

页数：7

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