Journal ArticleDOI
Polymer dispersed liquid crystal infrared light shutter
Reads0
Chats0
TLDR
A polymer dispersed liquid crystal device for operation in the midinfrared region of the electromagnetic spectrum that can be incorporated in thermal imaging systems that utilize pyroelectric vidicons for night vision applications is developed.Abstract:
We have developed a polymer dispersed liquid crystal
(PDLC) device for operation in the midinfrared region of the electromagnetic spectrum. This device can be incorporated in thermal imaging systems that utilize pyroelectric vidicons for night vision applications. The infrared electro-optic properties of several PDLCs
as a function of substrate, droplet size, film thickness, and applied ac voltage are examined using infrared spectroscopy, electro-optic and differential scattering measurements, and static video analysis.read more
Citations
More filters
Journal ArticleDOI
Thermal diodes, regulators, and switches: Physical mechanisms and potential applications
Geoff Wehmeyer,Tomohide Yabuki,Tomohide Yabuki,Christian Monachon,Junqiao Wu,Junqiao Wu,Chris Dames,Chris Dames +7 more
TL;DR: In this paper, the fundamental physical mechanisms of switchable and nonlinear heat transfer have been harnessed to make thermal diodes, switches, and regulators, and various nonlinear and active thermal circuits are presented.
Journal ArticleDOI
Low absorption liquid crystals for mid-wave infrared applications.
Yuan Chen,Haiqing Xianyu,Jie Sun,Przemysław Kula,Roman Dabrowski,Suvagata Tripathi,Robert J. Twieg,Shin-Tson Wu +7 more
TL;DR: A partially fluorinated terphenyl liquid crystal with low absorption in both mid-wave infrared (MWIR) and near IR regions is developed and its properties evaluated.
Journal ArticleDOI
Zero-static-power phase-change optical modulator.
Mohsen Jafari,Mina Rais-Zadeh +1 more
TL;DR: An innovative design of an electro-optical modulator using germanium telluride (GeTe) phase change material with an integrated nano-heater that is stable in both phases with higher than 12 dB change in transmission with zero static power consumption at room temperature.
Journal ArticleDOI
Low mid-infrared absorption tolane liquid crystals terminated by 2,2-difluorovinyloxyl: synthesis, characterization and properties
TL;DR: In this article, the synthesis and characterization of new 2,2-difluorovinyloxyl terminated tolane liquid crystals are reported, and mesomorphic properties, mid-wave infrared (MWIR) absorption and birefringence are investigated.
Journal ArticleDOI
Effect of a Photopolymerizable Monomer Containing a Hydrogen Bond on Near-Infrared Radiation Transmittance of Nematic Liquid Crystal/Monomers Composites
TL;DR: In this article, the effect of 2-hydroxyethylmethacrylate (HEMA) containing a hydrogen bond on the transmittance of PDLC films in the wavelength region of 300−2500 nm was investigated by UV−visible (VIS)−near-infrared (NIR) spectrophotometers, scanning electron microscopy, and an infrared spectrometer.
References
More filters
Journal ArticleDOI
Self‐phase modulation and optical limiting of a low‐power CO2 laser with a nematic liquid‐crystal film
TL;DR: In this paper, a nematic liquid crystal was employed for transverse self-phase modulation of a cw CO2 laser for infrared beam-limiting applications, and the observed optical intensity limiting and switching were in good agreement with theoretical expectations.