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