Efficient butt-coupling of surface plasmons on a silver-air interface

Caitlin Fisher; Lindsay C. Botten; Christopher G. Poulton; Ross C. McPhedran; C. Martijn de Sterke

doi:10.1117/12.2202452

22 December 2015 Efficient butt-coupling of surface plasmons on a silver-air interface

Caitlin Fisher, Lindsay C. Botten, Christopher G. Poulton, Ross C. McPhedran, C. Martijn de Sterke

Proceedings Volume 9668, Micro+Nano Materials, Devices, and Systems; 966824 (2015) https://doi.org/10.1117/12.2202452
Event: SPIE Micro+Nano Materials, Devices, and Applications, 2015, Sydney, New South Wales, Australia

Abstract

Butt-coupling of light into a surface plasmon is a simple and compact coupling method with a range of potential uses in photonic circuitry. Although butt-coupling has been successfully implemented in many coupling configurations, the coupling effectiveness is not fully understood. Here, we present a semi-analytical study which models the coupling efficiency of an incident beam into a surface plasmon on silver in the presence of loss using an projection method in one dimension. We find that the coupling efficiencies for silver between the wavelengths of 0:38 - 1:6 μm reach 77 - 88% with optimum incident beam parameters.

Citation Download Citation

Caitlin Fisher, Lindsay C. Botten, Christopher G. Poulton, Ross C. McPhedran, and C. Martijn de Sterke "Efficient butt-coupling of surface plasmons on a silver-air interface", Proc. SPIE 9668, Micro+Nano Materials, Devices, and Systems, 966824 (22 December 2015); https://doi.org/10.1117/12.2202452

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KEYWORDS

Surface plasmons

Silver

Interfaces

Wave propagation

Waveguides

Photonic integrated circuits

Waveguide modes

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