Transflective multiplexing of holographic polymer dispersed liquid crystal using Si additives

Sun, K. R.; Kang, Young Soo; Kim, B. K.

doi:10.3144/expresspolymlett.2011.8

Cited by 6 publications

(2 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It should be noted that we did not assume any specific profile for ∆ph(x) to derive Eq. (18). The movement of species, except LC, from the dark zones to bright ones creates refractive index variations in the dark zones and in the bright ones.…”

Section: Very Low Spatial Frequency Recordingmentioning

confidence: 99%

Diffractive and interferometric methods to characterize photopolymers with liquid crystal molecules as holographic recording material

Gallego¹,

Márquez²,

Ortuño³

et al. 2012

J. Eur. Opt. Soc.-Rapid Publ.

View full text Add to dashboard Cite

show abstract

Section: Very Low Spatial Frequency Recordingmentioning

confidence: 99%

Diffractive and interferometric methods to characterize photopolymers with liquid crystal molecules as holographic recording material

Gallego¹,

Márquez²,

Ortuño³

et al. 2012

J. Eur. Opt. Soc.-Rapid Publ.

View full text Add to dashboard Cite

show abstract

“…Among these materials, the CLC, which has a helical pitch, shows exceptional performance in optical physics. Because the unique helical structure has periodic characteristics, it can selectively reflect circularly polarized light according to Bragg's law 29–33 . The light reflection from a cholesteric helical structure is more complex than that from a crystal lattice, resulting in a more pronounced and obvious color change.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of imprinted photonic films via predesigned multiple UV‐polymerizations and their ability to detect solvents and metal ions in aqueous solution

Hung

Liu

Chang

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

To synthesize photonic films without a chiral dopant, a predesigned multiple photopolymerization process was carried out. The photonic films were prepared by the photopolymerization of a mixture of chiral nematic liquid crystals. After polymerization, the chiral dopant, CB15, was removed and recycled. The imprinted photonic polymer films showed Bragg reflection without the presence of the chiral dopant. Upon the sensing of solvents in aqueous solution, significant color changes and peak shifts were observed by the naked eye and ultraviolet–visible spectroscopy, respectively. A linear calibration curve between the central wavelength of the reflection band of the fabricated imprinting film and the volume ratio of 1,4‐dioxane in water was observed. Furthermore, the sensing of chloroform content in methanol, ethanol, and acetone via the imprinted film were also investigated. The results suggest that the synthesized imprinted photonic films can detect different kinds of mixed solvents. The sensing properties of the photonic films were further improved by copolymerization with a rhodamine‐derived monomer. The synthesized modified photonic films can detect heavy metal ions in aqueous solution. This study reports a novel, recyclable, and easy approach to detect organic solvents and copper ions in aqueous solution.

show abstract

Effects of prepolymer structure in holographic polymer dispersed liquid crystal

Jang

Yoon

Kim

2012

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

Three different types of polyols—poly(ethylene glycol) (PEG), poly(propylene glycol) (PPG), and poly(tetramethylene glycol)—with different molecular weights (Mn) were incorporated into the prepolymer structure, and the effects were examined with regard to the morphology and performance of holographic polymer dispersed liquid crystal. Among them, PEG showing the lowest glass transition temperature (Tg) exhibited the lowest threshold voltage (Vth), lowest operating voltage (Vop), and lowest diffraction efficiency with slow grating formation owing to its high viscosity of prepolymer mixture. The Tg decreased with increasing Mn because of the decreased crosslink density and hydrogen bonding, which reduced the anchoring strength, Vth and Vop. PPG400 gave Vth and Vop of approximately 7 and 24 V, respectively, with a contrast ratio of approximately 12. © 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2012

show abstract

Transflective multiplexing of holographic polymer dispersed liquid crystal using Si additives

Cited by 6 publications

References 26 publications

Diffractive and interferometric methods to characterize photopolymers with liquid crystal molecules as holographic recording material

Diffractive and interferometric methods to characterize photopolymers with liquid crystal molecules as holographic recording material

Fabrication of imprinted photonic films via predesigned multiple UV‐polymerizations and their ability to detect solvents and metal ions in aqueous solution

Effects of prepolymer structure in holographic polymer dispersed liquid crystal

Contact Info

Product

Resources

About