Method for optical molecular generation of localized chiral structures in photoactive liquid crystal films
https://doi.org/10.17586/0021-3454-2023-66-4-306-312
Abstract
A method for creating an optical scheme and the principle of using photoactive samples of chiral nematic liquid crystals for optical molecular generation of localized chiral structures are considered. It is shown that the existence of two different static localized chiral structures with sizes of about 25 and 10 µm is possible, depending on the power of the UV laser beam. The processes of reconfiguration of localized chiral liquid crystal structures into each other and into a completely frustrated state of a chiral nematic liquid crystal film are described. These localized structures can be used as miniaturized tunable optical elements for focusing and structuring transmitted light beams.
Keywords
nematic liquid crystal,
light-absorbing chiral molecular additive,
optical scheme,
static localized chiral structure,
director field restructuring
Supporting agencies: The authors thank Prof. Etienne Brasselet (University of Bordeaux, France), Dr. Supitchaya Iamsaard, Dr. Federico Lancia and Prof. Nathalie Katsonis (Stratingh Institute for Chemistry, University of Groningen, The Netherlands) for preparation of photoactive chiral nematic liquid crystal mixtures and provided liquid crystal samples.
About the Authors
D. D. Darmoroz
ITMO University
Russian Federation
Russian Federation
Darina D. Darmoroz - Post-Graduate Student; Faculty of Life Sciences
St. Petersburg
A. O. Piven
ITMO University
Russian Federation
Russian Federation
Anastasiia O. Piven - Master Student; Faculty of Life Sciences
St. Petersburg
T. Orlova
ITMO University
Russian Federation
Russian Federation
Tatiana Orlova - PhD; Faculty of Life Sciences; Infochemistry Scientific Center Leading Researcher
St. Petersburg
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Review
For citations:
Darmoroz D.D., Piven A.O., Orlova T. Method for optical molecular generation of localized chiral structures in photoactive liquid crystal films. Journal of Instrument Engineering. 2023;66(4):306-312. (In Russ.) https://doi.org/10.17586/0021-3454-2023-66-4-306-312
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