Laser-written polymeric scaffolds for micro-patterned liquid crystal alignment

Author(s)
M. Fleisch, S. Gao, D. Bosnjakovic, X. Zhang, R. A. Rupp, I. Drevensek-Olenik
Abstract

We demonstrate that two-photon polymerisation-based direct laser writing (TPP-DLW) is a very convenient technique for the fabrication of tunable liquid crystal (LC) based optical diffractive structures. The underlying TPP-DLW scaffold is composed of out-of-plane oriented polymeric ribbons with surface relief gratings on their side walls that induce parallel alignment of the adjacent LC medium. With the aid of such scaffolds infiltrated with the standard nematic liquid crystalline mixture E7, we prepared optical transmission gratings whose diffraction efficiency can be tuned with electric or magnetic fields. We report on an experimental and theoretical comparison between both types of tuning mechanisms.

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Organisation(s)
Physics of Functional Materials
External organisation(s)
Nankai University, University of Ljubljana, Josip Juraj Strossmayer University of Osijek, Jožef Stefan Institute (IJS), Universität Wien
Journal
Liquid Crystals
No. of pages
10
ISSN
0267-8292
DOI
https://doi.org/10.1080/02678292.2019.1631970
Publication date
06-2019
Peer reviewed
Yes
Austrian Fields of Science 2012
Condensed matter, Materials physics
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/laserwritten-polymeric-scaffolds-for-micropatterned-liquid-crystal-alignment(02a37a3d-23ea-4fdb-a1ea-3825fdeb7049).html