Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/90373
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Type: | Journal article |
Title: | Metamaterial fibres for subdiffraction imaging and focusing at terahertz frequencies over optically long distances |
Author: | Tuniz, A. Kaltenecker, K. Fischer, B. Walther, M. Fleming, S. Argyros, A. Kuhlmey, B. |
Citation: | Nature Communications, 2013; 4(1):2706-1-2706-8 |
Publisher: | Nature Publishing Group |
Issue Date: | 2013 |
ISSN: | 2041-1723 2041-1723 |
Statement of Responsibility: | Alessandro Tuniz, Korbinian J. Kaltenecker, Bernd M. Fischer, Markus Walther, Simon C. Fleming, Alexander Argyros and Boris T. Kuhlmey |
Abstract: | Using conventional materials, the resolution of focusing and imaging devices is limited by diffraction to about half the wavelength of light, as high spatial frequencies do not propagate in isotropic materials. Wire array metamaterials, because of their extreme anisotropy, can beat this limit; however, focusing with these has only been demonstrated up to microwave frequencies and using propagation over a few wavelengths only. Here we show that the principle can be scaled to frequencies orders of magnitudes higher and to considerably longer propagation lengths. We demonstrate imaging through straight and tapered wire arrays operating in the terahertz spectrum, with unprecedented propagation of near field information over hundreds of wavelengths and focusing down to 1/28 of the wavelength with a net increase in power density. Applications could include in vivo terahertz-endoscopes with resolution compatible with imaging individual cells. |
Rights: | This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/ |
DOI: | 10.1038/ncomms3706 |
Grant ID: | http://purl.org/au-research/grants/arc/DP120103942 |
Published version: | http://dx.doi.org/10.1038/ncomms3706 |
Appears in Collections: | Aurora harvest 7 Electrical and Electronic Engineering publications |
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hdl_90373.pdf | Published version | 2.1 MB | Adobe PDF | View/Open |
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