Enhanced light confinement in a near-field optical probe with a triangular aperture -: art. no. 210801

被引：76

作者：

Naber, A ^{[1
]}

Molenda, D ^{[1
]}

Fischer, UC ^{[1
]}

Maas, HJ ^{[1
]}

Höppener, C ^{[1
]}

Lu, N ^{[1
]}

Fuchs, H ^{[1
]}

机构：

[1] Inst Phys, D-48149 Munster, Germany

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.89.210801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a probe concept for scanning near-field optical microscopy combining the excellent background suppression of aperture probes with the superior light confinement of apertureless probes. A triangular aperture at the tip of a tetrahedral waveguide (full taper angle similar to90degrees) shows a strong field enhancement at only one rim when illuminated with light of suitable polarization. Compared to a circular aperture of equivalent size, the resolution capability is doubled without loss of brightness. For a similar to60 nm sized triangular aperture, we measured an optical resolution <40 nm and a transmission of similar to10(-4).

引用

页码：2108011 / 2108014

页数：4

共 29 条

[1] Perspectives on the physical chemistry of semiconductor nanocrystals [J].