The optical near-field of an aperture tip

被引：38

作者：

Drezet, A ^{[1
]}

Nasse, MJ

Huant, S

Woehl, JC

机构：

[1] Univ Grenoble 1, Spectrometrie Phys Lab, F-38402 St Martin Dheres, France

[2] CNRS, F-38402 St Martin Dheres, France

来源：

EUROPHYSICS LETTERS | 2004年 / 66卷 / 01期

关键词：

D O I：

10.1209/epl/i2003-10138-7

中图分类号：

O4 [物理学];

学科分类号：

0702 [物理学];

摘要：

We use fluorescent nanospheres as scalar detectors for the electric-field intensity in order to probe the near-field of an optical tip used in aperture-type near-field scanning optical microscopy (NSOM). Surprisingly, the recorded fluorescence images show two intensity lobes if the sphere diameter is smaller than the aperture diameter, as expected only in the case of vector detectors like single molecules. We present a simple but realistic, analytical model for the electric field created by light emitted from a NSOM tip which is in quantitative agreement with the experimental data.

引用

页码：41 / 47

页数：7

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