Holland, Wayne S., Mohamed, I., Pisano, Giampaolo  ORCID: https://orcid.org/0000-0003-4302-5681, Ng, M. W., Maffei, Bruno, Haynes, V. and Ozturk, F.
2012.
A negative refractive index metamaterial wave plate for millimetre-wave applications.
Presented at: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI,
Amsterdam, The Netherlands,
3-6 July 2012.
Published in: Holland, Wayne S. and Zmuidzinas, Jonas eds.
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI (Proceedings).
Proceedings of the SPIE
, vol.8452
Bellingham, WA:
SPIE,
p. 845228.
10.1117/12.926931
|
Abstract
By use of a metamaterial based on the ‘cut wire pair’ geometry, highly birefringent wave plates may be constructed by virtue of the geometry’s ability of having a negative and positive refractive index along its perpendicular axes. Past implementations have been narrow band in nature due to the reliance on producing a resonance to achieve a negative refractive index band and the steep gradient in the phase difference that results. In this paper we attempt to design and manufacture a W-band quarter wave plate embedded in polypropylene that applies the Pancharatnam method to increase the useable bandwidth. Our modelling demonstrates that a broadening of the phase difference’s bandwidth defined as the region 90° ± 2° is possible from 0.6% (101.7 GHz – 102.3 GHz) to 7.8% (86.2 GHz – 93.1 GHz). Our experimental results show some agreement with our modelling but differ at higher frequencies.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Subjects: | Q Science > QB Astronomy |
| Uncontrolled Keywords: | Metamaterials; Refractive index; Wave plates; Modeling; Manufacturing |
| Publisher: | SPIE |
| ISBN: | 9780819491534 |
| ISSN: | 0277-786X |
| Related URLs: | |
| Last Modified: | 25 Oct 2022 09:55 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/60479 |
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