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Demonstration of a new type of two-dimensional nondiffracting surface plasmon polariton

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Abstract

We introduce a new type of nondiffracting surface plasmon polaritons: the cosine-Gauss beam (CGB). We prove both theoretically and experimentally, via direct near-field imaging, that CGB is a nondiffracting solution to the two-dimensional wave equation.

© 2012 Optical Society of America

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