Liquid Crystal Based Polarization Gratings for Spectro-Polarimetric Applications

Two approaches to produce near-ideal Cycloidal Optical Axis Gratings (OAGs) based on liquid crystalline materials have been proposed. Both methods rely on polarization holograms recorded on the photoaligning substrates for liquid crystal devices. In the first case, a nematic LC layer, made of low mo...

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Published in:Molecular Crystals and Liquid Crystals 2012-05, Vol.558 (1), p.109-119
Main Authors: Lepera, E., Provenzano, C., Pagliusi, P., Cipparrone, G.
Format: Article
Language:English
Subjects:
Alignment
Crystals
Cycloidal optical axis grating
Diffraction gratings
Gratings (spectra)
Holograms
Holography
Liquid crystal polymers
Liquid crystals
polarimetry
Polarization
polarization holography
Substrates
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description Two approaches to produce near-ideal Cycloidal Optical Axis Gratings (OAGs) based on liquid crystalline materials have been proposed. Both methods rely on polarization holograms recorded on the photoaligning substrates for liquid crystal devices. In the first case, a nematic LC layer, made of low molar mass mesogens, is confined between two parallel substrates, both imposing spatially periodic planar alignment. In the second case, a reactive mesogen (RM) is coated on a single aligning substrate. The unique polarization properties of the OAG have been exploited for the development of a photopolarimeter and a real time and artifact-free circular dichroism spectrograph.
doi_str_mv 10.1080/15421406.2011.653716
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source EBSCOhost MLA International Bibliography With Full Text; Taylor and Francis Science and Technology Collection
subjects Alignment
Crystals
Cycloidal optical axis grating
Diffraction gratings
Gratings (spectra)
Holograms
Holography
Liquid crystal polymers
Liquid crystals
polarimetry
Polarization
polarization holography
Substrates
title Liquid Crystal Based Polarization Gratings for Spectro-Polarimetric Applications
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