Application of nematic liquid crystals to quasi-optical millimeter-wave devices

Masaki Tanaka; Susumu Sato

doi:10.1117/12.449936

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11 December 2001 Application of nematic liquid crystals to quasi-optical millimeter-wave devices

Masaki Tanaka, Susumu Sato

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Proceedings Volume 4463, Liquid Crystals V; (2001) https://doi.org/10.1117/12.449936
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

Relatively large electro-optic effects of nematic liquid crystal (LC) in the millimeter wavelength region have the possibility of an application to the electrically controlled millimeter-wave devices. The millimeter-wave transmission properties of the conventional nematic LC cells with a grating-patterned electrode structure are described. Novel LC cells with a stack-layered structure using metal substrates, which have a large effective path length, are prepared and large millimeter-wave transmission modulation of 50% can be attained by applying an external electric field to the LC cell. The stack-layered structure is useful for an application to the millimeter-wave devices. Then, the LC prism and LC lens as the quasi-optical millimeter-wave devices using the stack-layered structure are proposed. Deflection and focusing effects of the millimeter-wave are observed by applying an external electric field to the LC cells.

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Masaki Tanaka and Susumu Sato "Application of nematic liquid crystals to quasi-optical millimeter-wave devices", Proc. SPIE 4463, Liquid Crystals V, (11 December 2001); https://doi.org/10.1117/12.449936

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