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.
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页数：10
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