A negative refractive index metamaterial wave plate for millimetre wave applications

I. Mohamed, G. Pisano, M. W. Ng, B. Maffei, V. Haynes, F. Ozturk

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    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. © 2012 SPIE.
    Original languageEnglish
    Title of host publicationProceedings of SPIE - The International Society for Optical Engineering|Proc SPIE Int Soc Opt Eng
    Place of PublicationBellingham, WA
    PublisherSPIE
    Volume8452
    ISBN (Print)9780819491534
    DOIs
    Publication statusPublished - 2012
    EventMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI - Amsterdam
    Duration: 1 Jul 2012 → …

    Conference

    ConferenceMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI
    CityAmsterdam
    Period1/07/12 → …

    Keywords

    • Metal mesh
    • Metamaterial
    • Negative refractive index
    • Pancharatnam
    • Wave plate

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