Probing surface plasmons by bare V-shaped tips: modeling by geometrical optics and rigorous diffraction theory

被引：1

作者：

Bose, Gaurav ^{[1
]}

Hyvarinen, Heikki J. ^{[2
]}

Tervo, Jani ^{[1
]}

Turunen, Jari ^{[1
]}

机构：

[1] Univ Eastern Finland, Inst Photon, POB 111, Joensuu 80101, Finland

[2] Microsoft Hololens, Keilalahdentie 2-4, Espoo 02150, Finland

来源：

OPTICAL REVIEW | 2017年 / 24卷 / 02期

基金：

芬兰科学院;

关键词：

Nanophotonics; Diffractive optics; Geometrical optics; Plasmonics; BLAZED TRANSMISSION GRATINGS; LIGHT; SLITS;

D O I：

10.1007/s10043-016-0301-z

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We consider probing inhomogeneous waves in the near fields of metallic nanostructures with the aid of a dielectric V-shaped wedge connected to a waveguide. A geometrical model based on the local plane interface approach is proposed to describe the interaction of the wedge with the inhomogeneous field. The fundamental ideas behind the geometrical model are validated by comparison with the results given by rigorous diffraction analysis, and applied to probing plasmonic interference patterns generated by metallic gratings with very narrow slits. The model explains intuitively why a bare wedge with a large apex angle is capable of subwavelength resolution in the spirit of scanning near-field microscopy.

引用

页码：97 / 104

页数：8