Skip to main content. Novel free standing responsive hydrogen bonded dye-doped cholesteric films have been synthesized and studied as effective light emitting and lasing materials sensitive to changes in chemical environment. The results indicate that the multiplexing of nonuniform DM-type fingerprint gratings, cross-polarized light readout, and unique polarization diffraction characteristics can improve the level of security. November 8, Revised Manuscript: You do not have subscription access to this journal. We demonstrated transmissive- and reflective-type Fresnel lenses based on dye-doped liquid crystal using photoalignment technique.
We’ve also updated our Privacy Notice. To lower the modulation voltage, the nematic liquid crystals with high dielectric constant was selected, and thus, the emission energy can be modulated with a voltage of less than 10 V. Abstract Optical and materials properties of photonic band gap structures based on cholesteric liquid crystals are analyzed and discussed. Novel free standing responsive hydrogen bonded dye-doped cholesteric films have been synthesized and studied as effective light emitting and lasing materials sensitive to changes in chemical environment. From Polarized Light Emission to Lasing. The monomer concentration effects on lasing performances were studied and discussed. November 8, Revised Manuscript:
One- and biphotonic reorientational nonlinearities in dye-doped nematic and cholesteric liquid crystals. Fuh, and Shin-Tson Wu Opt. Chholesteric also updated etudies Privacy Notice. March 15, Manuscript Accepted: Polymer walls formed by photopolymerization of pre-polymer provide several advantages of flexible display applications such as good mechanical properties and low cell.
The role cholestwric crosslinking and polarity in the dark relaxation of azobenzene-based, polymer-stabilised cholesteric liquid crystals. You do not have subscription access to this journal. Express 12 9 Click here to sign up. References You do not have subscription access to this journal. We evaluated the feasibility of embedding periodically arranged squares with planar and vertical texture into a background with a developable-modulation DM type cholesteric liquid crystal CLC fingerprint texture by a two-step ultraviolet-induced polymerization method.
Please login to set citation alerts. Express 6 4 Click here to see a list of articles that cite this paper. This also affects the chiral interactions controlling the helical organization of the cholesteric polymers and results in changes of the selective reflection and photonic band gap structure of novel cholesteric polymers.
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You may subscribe either as an OSA member, or as an authorized user polymerr-stabilized your institution. Remember me on this computer. Citing articles from OSA journals and other participating publishers are listed here. Home To Top Previous Article. It is noteworthy that visible light initiation system was adopted to prevent the deformation of photonic band gap.
It is fabricated using a simple process consisting of thermal annealing followed by UV irradiation through a grating photomask.
OSA | Low-voltage-modulated laser based on dye-doped polymer stabilized cholesteric liquid crystal
From Polarized Light Emission to Lasing. It should tsxture noted that the pitch length change is irreversible. Taking advantage of the textute randomness and uncontrollable variations of a DM-type fingerprint textures, a polymer-stabilized CLC PSCLC graphic symbol with a 2D barcode pattern was then implemented with enhanced anti-counterfeiting features that are difficult to falsify or duplicate.
Polymer stabilization was carried out to obtain a stable and switchable helical liquid crystal system. Remember me on this computer.
CHOLESTERIC LIQUID CRYSTAL
Alert me when this article is cited. This study provides some new insights into the fabrication, materials improvements and performances of dye-doped liquid crystal laser, and such electrically modulated laser will be a prospective candidate in the laser displays, micro-light-source or the other optical systems.
CHOLESTERIC LIQUID CRYSTAL Research Papers –
The results indicate that the laser emission threshold is decreased and the te time is shortened with the increasing of monomer, while the hysteresis may be enhanced. November 8, Revised Chokesteric Abstract We evaluated the feasibility of embedding periodically arranged squares with planar and vertical texture into a background with a developable-modulation DM type cholesteric liquid crystal CLC fingerprint texture by a two-step ultraviolet-induced polymerization method.
The experimental results show that the photo-isomerization of azo-C5 not only changes the clearing point of the sample, but