Dresden 2011 – scientific programme

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O: Fachverband Oberflächenphysik

O 41: Plasmonics and Nanooptics IV

O 41.1: Talk

Wednesday, March 16, 2011, 11:15–11:30, WIL A317

Steering and Negative Refraction of Surface Plasmon Beams — •Benedikt Stein, Jean-Yves Laluet, Eloïse Devaux, Cyriaque Genet, and Thomas W. Ebbesen — ISIS, Université de Strasbourg & CNRS, 8 allée Gaspard Monge, 67000 Strasbourg, France

Surface plasmon polaritons have raised renewed interest over the past decade for their potential in optical devices and circuits [1]. Inspired by the design principles of photonic bandgap materials [2,3], we have studied the propagation of surface plasmon beams through singly and doubly periodic metallic gratings. Large beam steering effects are experimentally revealed by probing the isofrequency surfaces related to propagating Bloch waves inside the gratings. In particular, negative refraction is demonstrated close to the Bragg condition. We also analyze how the local structure of the isofrequency surface can amplify the sensitivity of surface plasmon based refractive-index sensors [4].

[1] Barnes, W. L.; Dereux, A.; Ebbesen, T. W. Nature 2003, 424, 824

[2] Zengerle, R. Journal of Modern Optics 1987, 34, 1589

[3] Russell, P.S.J. Phys. Rev. A. 1986, 33, 3232

[4] Stein, B.; Laluet, J.-Y.; Devaux, E.; Genet, C.; Ebbesen, T. W. Phys. Rev. Lett., in press