Beating the diffraction limit using a 3D nanowires metamaterials nanolens

B. D. F. Casse; Y. J. Huang; W. T. Lu; E. Gultepe; L. Menon; S. Sridhar

doi:10.1117/12.883699

16 May 2011 Beating the diffraction limit using a 3D nanowires metamaterials nanolens

B. D. F. Casse, Y. J. Huang, W. T. Lu, E. Gultepe, L. Menon, S. Sridhar

Proceedings Volume 8034, Photonic Microdevices/Microstructures for Sensing III; 803407 (2011) https://doi.org/10.1117/12.883699
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

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.

Citation Download Citation

B. D. F. Casse, Y. J. Huang, W. T. Lu, E. Gultepe, L. Menon, and S. Sridhar "Beating the diffraction limit using a 3D nanowires metamaterials nanolens", Proc. SPIE 8034, Photonic Microdevices/Microstructures for Sensing III, 803407 (16 May 2011); https://doi.org/10.1117/12.883699

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