Polarization Gratings in Azobenzene-Based Fully Liquid Crystalline Triblock Copolymer

Miron Bugakov*, Oksana Sakhno, Natalia Boiko, Alexander Ryabchun

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)

Abstract

Photosensitive liquid crystalline (LC) block copolymers are a universal platform for designing functional materials for optics and photonics. Here, azobenzene LC ABA triblock copolymer containing mesogenic groups in each block is studied as a medium for the recording of polarization holographic gratings. The fast recording of polarization gratings is successfully performed with two orthogonally circularly polarized light beams of a 532-nm laser. It is shown that annealing of the recorded polarization grating increases diffraction efficiency considerably, by a factor of 70, and provokes simultaneous erasing of the surface relief grating if it has been recorded. Holographic behavior of the triblock copolymer is compared with that of an azobenzene homopolymer and a random copolymer, which has the same monomer ratio as the triblock copolymer. The obtained results are expected to allow designing new materials for the polarization of optical elements and holographic data storage.

Original languageEnglish
Article number1900412
JournalMacromolecular rapid communications
Volume40
Issue number23
DOIs
Publication statusPublished - 1 Dec 2019

Keywords

  • UT-Hybrid-D
  • holography
  • liquid crystalline polymers
  • polarization gratings
  • surface relief gratings
  • azobenzene

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