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Experimental realization of an achromatic magnetic mirror based on metamaterials

Pisano, Giampaolo, Ade, Peter and Tucker, Carole 2016. Experimental realization of an achromatic magnetic mirror based on metamaterials. Applied Optics 55 (18) , pp. 4814-4819. 10.1364/AO.55.004814

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Abstract

Our work relates to the use of metamaterials engineered to realize a meta-surface approaching the exotic properties of an ideal object not observed in nature, a ‘magnetic mirror’. Previous realizations were based on resonant structures which implied narrow bandwidths and large losses. The working principle of our device is ideally frequency-independent, it does not involve resonances and it does not rely on a specific technology. The performance of our prototype, working at millimetre wavelengths, has never been achieved before and it is superior to any other device reported in the literature, both in the microwave and optical regions. The device inherently has large bandwidth (144%), low losses (<1 %) and is almost independent of incidence-angle and polarization-state and thus approaches the behaviour of an ideal magnetic mirror. Applications of magnetic mirrors range from low-profile antennas, absorbers to optoelectronic devices. Our device can be realised using different technologies to operate in other spectral regions.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Uncontrolled Keywords: OCIS codes: (120.0120 Instrumentation, measurement, and metrology), (160.3918 Metamaterials), (220.0220 Optical design and fabrication), (160.1245 Artificially engineered materials), (230.0230 Optical devices), (240.6700 Surfaces), (350.2460 Filters, interference), (040.2235 Far infrared or terahertz), (050.6624 Subwavelength structures)
Additional Information: Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License
Publisher: OSA Publishing
ISSN: 00036935
Funders: STFC
Date of First Compliant Deposit: 6 January 2017
Date of Acceptance: 23 May 2016
Last Modified: 16 Jul 2019 15:59
URI: http://orca-mwe.cf.ac.uk/id/eprint/93678

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