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Phys Rev Lett. 2011 Sep 16;107(12):126804. Epub 2011 Sep 15.

Plasmonic Airy beam generated by in-plane diffraction.

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1
National Laboratory of Solid State Microstructures, College of Physics, Nanjing University, Nanjing 210093, China.

Abstract

We report an experimental realization of a plasmonic Airy beam, which is generated thoroughly on a silver surface. With a carefully designed nanoarray structure, such Airy beams come into being from an in-plane propagating surface plasmon polariton wave, exhibiting nonspreading, self-bending, and self-healing properties. Besides, a new phase-tuning method based on nonperfectly matched diffraction processes is proposed to generate and modulate the beam almost at will. This unique plasmonic Airy beam as well as the generation method would significantly promote the evolutions in in-plane surface plasmon polariton manipulations and indicate potential applications in lab-on-chip photonic integrations.

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