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HOLOGRAPHIC POLYMER DISPERSED LIQUID CRYSTALS

United States Patent Application

20160370625
A1
View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A hyperspectral holographic polymer dispersed liquid crystal (HPDLC) medium comprising broadband reflective properties may comprise dopants that result in a hyperspectral HPDLC with fast transitional switching speeds. Dopants may include alliform carbon particles, carbon nanoparticles, piezoelectric nanoparticles, multiwalled carbon nanotubes, a high dielectric anisotropy compound, semiconductor nanoparticles, electrically conductive nanoparticles, metallic nanoparticles, or the like. A technique for fabrication of hyperspectral broadband HPDLC mediums may involve dynamic variation of the holography setup during HPDLC formation and spatial multiplexing that may enable broadening of the HPDLC medium's wavelength response. Fabrication may include concurrently running multiple exposures and exploiting superpositioning of the resultant gratings. The hyperspectral HPDLC may be capable of blocking and/or filtering wavelengths in the range of approximately 390 nm to approximately 12 .mu.m.
Fontecchio, Adam K. (Downingtown, PA), Rai, Kashma (Malden, MA)
15/ 254,471
September 1, 2016
GOVERNMENT RIGHTS [0002] This invention was made in part with government support under Grant No. NNG04G042G awarded by the National Aeronautics and Space Administration (NASA), Grant No. DE-FG02-08ER86355 awarded by the Department of Energy (DOE), and grant number DEAC05-000R22725 awarded by the U.S. Department of Energy, Fluid Interface Reactions, Structures and Transport (FIRST) Center. The government has certain rights in the invention.