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Proceedings Paper

Metallic superlens designed with close-to-cutoff of long-range SPP mode
Author(s): Guillaume Tremblay; Yunlong Sheng
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Paper Abstract

The metallic superlens of a single negative permittivity is easier to implement than the double negative material superlens and can be applied to nano-scale resolution lithography. The metallic superlens amplifies by the resonance the surface plasmon polariton (SPP) waves, which carry the sub-wavelength detail information of the object. However, the excitations of the long- and the short-range SPP modes of the metal slab lead to two peaks in the transfer function which enhance the spatial frequencies disproportionally, resulting in strong sidelobes in the image. Conventionally the metallic superlens is designed by trials without rules to follow. We propose to design the metallic superlens by approaching the cutoff condition of the long-range SPP mode in order to flatten the transfer function and to improve the imaging performance significantly. Design experiments of Al and Ag superlens with both the transfer-matrix approach and the numerical Finite Difference in Time Domain method are shown.

Paper Details

Date Published: 17 November 2010
PDF: 6 pages
Proc. SPIE 7848, Holography, Diffractive Optics, and Applications IV, 78480G (17 November 2010); doi: 10.1117/12.870337
Show Author Affiliations
Guillaume Tremblay, Univ. Laval (Canada)
Yunlong Sheng, Univ. Laval (Canada)

Published in SPIE Proceedings Vol. 7848:
Holography, Diffractive Optics, and Applications IV
Yunlong Sheng; Chongxiu Yu; Linsen Chen, Editor(s)

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