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期刊论文
Free-space coupling of a light beam into a symmetrical metal-claddingoptical waveguide
APPLIED PHYSICS LETTERS VOLUME 83, NUMBER 14，-0001，（）：
We report on a coupling method, which transfers energy of a light beam from free space into asymmetrical metal-cladding optical waveguide from the top surface without employing the prism,grating, tapered film, and other coupling components. In the experiment, a glass flat with a thicknessabout 100um, sandwiched between two gold films is used as a guiding layer. A top gold film of 46nm thick serves as a coupling layer as well as the cladding and a base gold film of 200nm servesas the substrate of the waveguide. Up to 50% of the incident light energy fed into the waveguide hasbeen demonstrated.
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