Metamaterial fibres for subdiffraction imaging and focusing at terahertz frequencies over optically long distances
Files
(Published version)
Date
2013
Authors
Tuniz, A.
Kaltenecker, K.
Fischer, B.
Walther, M.
Fleming, S.
Argyros, A.
Kuhlmey, B.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Nature Communications, 2013; 4(1):2706-1-2706-8
Statement of Responsibility
Alessandro Tuniz, Korbinian J. Kaltenecker, Bernd M. Fischer, Markus Walther, Simon C. Fleming, Alexander Argyros and Boris T. Kuhlmey
Conference Name
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.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
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/