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Metamaterial-based Toraldo pupils for super-resolution at millimetre wavelengths

Gao, Jian-Rong, Zmuidzinas, Jonas, Shitvov, Alexey, Maffei, Bruno, Riminesi, Cristiano, Navarrini, Alessandro, Orfei, Alessandro, Migliozzi, Massimo, D'Agostino, Francesco, Olmi, Luca, Bolli, Pietro, Mugnai, Daniela, Tucker, Carole and Pisano, Giampaolo 2018. Metamaterial-based Toraldo pupils for super-resolution at millimetre wavelengths. Presented at: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, TX, USA, 10-15 June 2018. Published in: Zmuidzinas, Jonas and Gao, Jian-Rong eds. Proceedings, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX; 107080G (2018). Proceedings of SPIE Bellingham, Washington: SPIE, p. 14. 10.1117/12.2314086

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Using the long-established Cardiff metal-mesh filter technology, we have exploited our ability to artificially manipulate the phase of a wavefront across a device in order to produce a dielectric-based Toraldo pupil working at millimeter wavelengths. The use of a Toraldo pupil to push the angular resolution of an optical imaging system beyond the classical diffraction limit is yet to be realized in the millimeter regime, but is an exciting prospect. Here we present the design and measured performance of a prototype Toraldo pupil, based on a 5 annuli design.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: SPIE
ISBN: 9781510619708
ISSN: 1996-756X
Last Modified: 25 Jul 2022 07:38

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