Converging and wave guiding of Gaussian beam by two-layer dielectric rods

Dai, W.; Soukoulis, C. M.
November 2008
Applied Physics Letters;11/17/2008, Vol. 93 Issue 20, p201101
Academic Journal
We have shown that a two-layer dielectric structure can give excellent beaming and enhanced transmission simultaneously of a Gaussian source. The front surface of the layer of dielectric rods supports surface states and the rear grading layer couples the surface states to radiation modes. By repeating periodically this two-layer structure, one can obtain excellent beaming and enhanced transmission for very long distances.


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