Momentum-space spectroscopy for advanced analysis of dielectric-loaded surface plasmon polariton coupled and bent waveguides

被引：21

作者：

Hassan, K. ^{[1
]}

Bouhelier, A. ^{[1
]}

Bernardin, T. ^{[1
]}

Colas-des-Francs, G. ^{[1
]}

Weeber, J. -C. ^{[1
]}

Dereux, A. ^{[1
]}

机构：

[1] Univ Bourgogne, CNRS, UMR 6303, Lab Interdisciplinaire Carnot Bourgogne, F-21078 Dijon, France

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 19期

基金：

欧洲研究理事会;

关键词：

LEAKAGE RADIATION; PROPAGATION; WAVELENGTHS; MICROSCOPY; EXCITATION;

D O I：

10.1103/PhysRevB.87.195428

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We perform advanced radiation leakage microscopy of routing dielectric-loaded plasmonic waveguiding structures. By direct-plane imaging and momentum-space spectroscopy, we analyze the energy transfer between coupled waveguides as a function of gap distance and reveal the momentum distribution of curved geometries. Specifically, we observed a clear degeneracy lift of the effective indices for strongly interacting waveguides in agreement with coupled-mode theory. We use momentum-space representations to discuss the effect of curvature on dielectric-loaded waveguides. The experimental images are successfully reproduced by a numerical and an analytical model of the mode propagating in a curved plasmonic waveguide.

引用

页数：10

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