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Numerical optimization of a grating coupler for the efficient excitation of surface plasmons at an Ag SiO 2 interface

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Abstract

The efficient generation of surface plasmons from free-space optical waves is still an open problem in the field. Here we present a methodology and optimized design for a grating coupler. The photoexcitation of surface plasmons at an AgSiO2 interface is numerically demonstrated to yield a 50% coupling efficiency from a Gaussian beam into surface plasmon voltages and currents.

© 2007 Optical Society of America

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