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Demonstration of integrated optics elements based on long-ranging surface plasmon polaritons

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Abstract

An experimental investigation of long-ranging surface plasmon-polariton waves guided along thin finite width Au structures embedded in a homogeneous background dielectric is reported. The operation of key passive integrated optics elements such as straight waveguides, s-bends, y-junctions and couplers is demonstrated at a free space optical wavelength of 1550 nm. The influence of some important design parameters on the performance of these elements is presented and discussed.

©2005 Optical Society of America

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Figures (6)

Fig. 1.
Fig. 1. Illustration of a thin metal film waveguide characterized by w/t>1.
Fig. 2.
Fig. 2. Illustration of the metal waveguide integrated optics structures investigated.
Fig. 3.
Fig. 3. IR output of straight waveguides designed with the film width indicated by each image.
Fig. 4.
Fig. 4. Infrared output of s-bends designed with the radius of curvature given by each image.
Fig. 5.
Fig. 5. IR output of y-junctions using the radius of curvature indicated beside each image.
Fig. 6.
Fig. 6. IR output of couplers. The separation S is indicated beside each image.
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