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Scattering in elements of plasmon optics suppressed by two-layer dielectric structures

E. A. Bezus^ab, L. L. Doskolovich^ab, N. L. Kazanskii^ab, V. A. Soifer<sup>ab

a</sup> Image Processing Systems Institute, Russian Academy of Sciences, Samara
^b Samara State Aerospace University

Abstract: Based on the results of simulations in the framework of a rigorous electromagnetic theory of diffraction, it is shown that a structure comprising two isotropic dielectric layers on a metal surface can be used to suppress parasitic scattering in elements of plasmon optics. The proposed dielectric structure makes possible a tenfold decrease (to 1–3%) in the level of scattering losses. This approach can also be applied in creating various elements of plasmon optics, in particular, lenses and Bragg reflection gratings.

Received: 16.05.2011

 English version: Technical Physics Letters, 2011, 37:12, 1091–1095

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