Nanoscale liquid crystal polymer Bragg polarization gratings
نویسندگان
چکیده
منابع مشابه
Liquid-Crystal-Cladding Fiber Bragg Gratings with Electrically Controllable Polarization-Dependent Characteristics
An electrically controllable fiber Bragg grating (FBG) with polarization-dependent characteristics is described. The optic axis of a liquid crystal (LC) can be rearrangeable by means of external electric fields, which results in the change of an effective refractive index of an LC. The reflectivity and Bragg wavelength of an LC-cladding FBG can be controlled according to the refractive index of...
متن کاملInvestigation of Bragg Gratings Recorded in Polymer- Dispersed Liquid Crystals
Bragg gratings, holographically formed in polymer-dispersed liquid crystals (H-PDLCs) are studied. Mixture of the commercially available E7 liquid crystal and NOA65 polymer in ration 1:1 are employed. Polymerisation in presence of electric field is produced. A significant increase of the diffraction efficiency in the case of field-applied recording is observed. The exposure characteristics, ele...
متن کاملLiquid-crystal diffraction gratings using polarization holography alignment techniques
A method of patterning surfaces for liquid-crystal alignment using a polarization holography exposure on a linear photopolymerizable polymer alignment layer is demonstrated. Three configurations are demonstrated which include registered planar-periodic surface boundary conditions on both surfaces true polarization gratings , planar-periodic and uniform planary surface boundary conditions, and p...
متن کاملControlling the anisotropy of holographic polymer-dispersed liquid-crystal gratings.
In this work we investigate the optical properties of electrically switched transmission gratings fabricated holographically using polymer-dispersed liquid-crystal (PDLC) materials. We have found that the PDLC mixture can be used to control the diffractive properties of the liquid-crystal composite gratings. In one limit the gratings are highly isotropic and in the other limit the gratings are ...
متن کاملThermally and electrically switchable gratings based on polymer-ball-type polymer-dispersed liquid-crystal films.
We focus on the fabrication and study of controllable holographic gratings based on azo-dye-doped and undoped polymer-ball-type polymer-dispersed liquid-crystal films. Experimental results indicate that the next step of photopolymerization of the sample with the illumination of Ar+ laser beams after UV curing causes a latent density grating to be recorded. This grating is formed by a selective ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Optics Express
سال: 2017
ISSN: 1094-4087
DOI: 10.1364/oe.25.019298