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Proceedings Paper

Near-field pattern synthesis at optical frequencies
Author(s): Lucio Vegni; Filiberto Bilotti
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Paper Abstract

In this work, we present the design of a reactive screen to synthesize a desired field pattern with sub-wavelength features at visible frequencies. Following the recent theoretical developments in the field of optical nano-circuits, the screen consists of a discrete set of dielectric cells, behaving as lumped reactive elements in the visible. The spatial distribution of the cells enables the focalization of a sub-wavelength spot at a prescribed focal distance. The resolution achievable with the proposed technique depends on the electrical size of the cells and on their mutual separations. The theoretical expectations are confirmed by the numerical results, obtained through a proper full-wave simulator based on the finite integration technique. Some design examples are, finally, presented to show some of the capabilities of the proposed method.

Paper Details

Date Published: 1 September 2009
PDF: 8 pages
Proc. SPIE 7392, Metamaterials: Fundamentals and Applications II, 73921D (1 September 2009); doi: 10.1117/12.825083
Show Author Affiliations
Lucio Vegni, Univ. degli Studi di Roma Tre (Italy)
Filiberto Bilotti, Univ. degli Studi di Roma Tre (Italy)

Published in SPIE Proceedings Vol. 7392:
Metamaterials: Fundamentals and Applications II
Mikhail A. Noginov; Nikolay I. Zheludev; Allan D. Boardman; Nader Engheta, Editor(s)

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