Microwaves: thin metal slits and liquid crystals

John Roy Sambles; Alastair Paul Hibbins; Robert J. Kelly; James R. Suckling; Fuzi Yang

doi:10.1117/12.580829

30 November 2004 Microwaves: thin metal slits and liquid crystals

John Roy Sambles, Alastair Paul Hibbins, Robert J. Kelly, James R. Suckling, Fuzi Yang

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Proceedings Volume 5618, Integrated Optical Devices, Nanostructures, and Displays; (2004) https://doi.org/10.1117/12.580829
Event: European Symposium on Optics and Photonics for Defence and Security, 2004, London, United Kingdom

Abstract

Using liquid crystals to control the propagation of microwaves is a potentially interesting technology. By incorporating small amounts of liquid crystal in thin slat metal structures through which the microwaves may resonantly pass a whole new range of voltage tuned microwave devices are becoming available. Metallic sub-wavelength slit structures at microwave frequencies have been constructed which show Fabry-Perot type resonances in very thin slits. If the dielectric in such thin slits is an aligned liquid crystal it is found possible to voltage-control the resonant frequencies. Novel selective filters and structures for microwave beam steering have been fabricated leading to a new generation of liquid crystal controlled devices.

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John Roy Sambles, Alastair Paul Hibbins, Robert J. Kelly, James R. Suckling, and Fuzi Yang "Microwaves: thin metal slits and liquid crystals", Proc. SPIE 5618, Integrated Optical Devices, Nanostructures, and Displays, (30 November 2004); https://doi.org/10.1117/12.580829

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KEYWORDS

Liquid crystals

Metals

Microwave radiation

Surface plasmons

Fabry–Perot interferometers

Dielectrics

Refractive index

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