Detection and characterization of longitudinal field for tip-enhanced Raman spectroscopy

被引：229

作者：

Hayazawa, N ^{[1
]}

Saito, Y

Kawata, S

机构：

[1] RIKEN, Nanophoton Lab, Wako, Saitama 3510198, Japan

[2] Japan Corp Sci & Technol, CREST, Tokyo, Japan

[3] Osaka Univ, Dept Appl Phys, Osaka 5650871, Japan

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 25期

关键词：

D O I：

10.1063/1.1839646

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We characterized the longitudinal field formed at a tightly focused spot by a high numerical aperture objective lens using a tip-enhanced near-field microscope. The longitudinal field efficiently excites the localized surface plasmon polaritons at the metallic tip apex resulting in an electric field enhancement. Radially polarized light generated by a combination of four half-waveplates successfully increases the longitudinal field resulting in higher sensitivity for tip-enhanced Raman spectroscopy of adenine nanocrystals. (C) 2004 American Institute of Physics.

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页码：6239 / 6241

页数：3

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