Crystals, Vol. 15, Pages 877: On-Demand Photopatterned Twisted Nematics for Generation of Polychromatic Vector Fields

Crystals doi: 10.3390/cryst15100877

Authors:
Edvard Grigoryan
Hayk H. Harutyunyan
Hrayr Hakobyan
Sergey A. Shvetsov
Tetiana Orlova
Mushegh Rafayelyan
Vahram L. Grigoryan

A simple and efficient approach to spatially addressed polychromatic modulation of light polarization using a photopatterned nematic liquid crystal film is proposed and investigated. In particular, we demonstrate linear polarization structuring of the broadband probe beam, including the formation of polarization singularities under the adiabatic propagation of linearly polarized light, which is achieved through in situ, rewritable photoalignment of nematic liquid crystal by a pump beam. This opto-optical control of polarization does not involve dynamic phase modulation and enables spatially resolved polarization patterning of broadband linearly polarized light in real time.

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Edvard Grigoryan www.mdpi.com