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Proceedings Paper

Sensitivities of large-aperture plasmonic metasurface flat lenses in the long-wave infrared
Author(s): Bryan M. Adomanis; Matthew R. Miller; Stephen E. Nauyoks; Michael A. Marciniak
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Paper Abstract

Plasmonic metasurface lenses based on polarization conversion are inherently limited in efficiency, and as a result, they have been given sparse attention in favor of higher-performing dielectric variants. However, recent proposals for expanding the design beyond a single interface offer hope for efficient plasmonic structures. Before developing these multi-layer structures, we wish to better understand dependencies of 2D plasmonic designs. Here we demonstrate the spectral, polarization and geometrical sensitivities of nine large-scale variants of the original V-antenna lens design at λ0 = 8μm. We show that the spectral response oscillates rapidly within a span as small as λ0/320, and that strong focusing can occur at both the designed polarization state, and its orthogonal state–and with differing focal distances. Additionally, we determine that the lens performance is only weakly tied to the size of the discretization, offering only marginal improvement as the discretization approaches a continuum.

Paper Details

Date Published: 21 February 2018
PDF: 9 pages
Proc. SPIE 10542, High Contrast Metastructures VII, 1054210 (21 February 2018); doi: 10.1117/12.2291577
Show Author Affiliations
Bryan M. Adomanis, Air Force Institute of Technology (United States)
Matthew R. Miller, Air Force Institute of Technology (United States)
Wright State Univ. (United States)
Stephen E. Nauyoks, Air Force Institute of Technology (United States)
Michael A. Marciniak, Air Force Institute of Technology (United States)

Published in SPIE Proceedings Vol. 10542:
High Contrast Metastructures VII
Connie J. Chang-Hasnain; Andrei Faraon; Fumio Koyama; Weimin Zhou, Editor(s)

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