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Proceedings Paper

Beating the diffraction limit using a 3D nanowires metamaterials nanolens
Author(s): B. D. F. Casse; Y. J. Huang; W. T. Lu; E. Gultepe; L. Menon; S. Sridhar
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Paper Abstract

Super-resolution imaging using a three-dimensional metamaterials nanolens has been recently reported [B. D. F. Casse et al. Appl. Phys. Lett. 96, 023114 (2010)]. This nanolens, consisting of bulk gold nanowires embedded in alumina template, can transport with low-loss object details down to λ/4 (λ, wavelength) length scales, over significant distances of the order of 6λ. Here, we present validation of the super-resolution imaging by the nanolens through extensive control experiments. We also analytically show that the nanowire array medium supports a quasi transverse electromagnetic mode (TEM) with flat isofrequency contours, which is a requirement for super-resolution imaging. We numerically compute the optical transfer function to quantify the imaging quality of the lens and show that the theoretical resolution of this nanolens is λ/5. Additionally, we demonstrate the broadband nature of the lens in the spectral region 1510 nm to 1580 nm. Finally, imaging of a large object (~ 52λ in diameter), with subwavelength features, is presented.

Paper Details

Date Published: 16 May 2011
PDF: 6 pages
Proc. SPIE 8034, Photonic Microdevices/Microstructures for Sensing III, 803407 (16 May 2011); doi: 10.1117/12.883699
Show Author Affiliations
B. D. F. Casse, Northeastern Univ. (United States)
Y. J. Huang, Northeastern Univ. (United States)
W. T. Lu, Northeastern Univ. (United States)
E. Gultepe, Northeastern Univ. (United States)
L. Menon, Northeastern Univ. (United States)
S. Sridhar, Northeastern Univ. (United States)

Published in SPIE Proceedings Vol. 8034:
Photonic Microdevices/Microstructures for Sensing III
Hai Xiao; Xudong Fan; Anbo Wang, Editor(s)

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