Temperature-responsive polymer wave Plates as tunable polarization converters

Augustinus J.J. Kragt, Iris P.M. van Gessel, Albertus P.H.J. Schenning (Corresponding author), Dirk J. Broer

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)
29 Downloads (Pure)

Abstract

A temperature-responsive polarization converter, which reversibly changes from a full-wave to a half-wave plate upon heating, is developed. The polymer wave plate has a controlled thickness and is based on a uniaxial aligned nematic semi-interpenetrating network coating containing a specific concentration of a non-crosslinked liquid crystal elastomer. Upon heating, the effective birefringence of the wave plate halves without changing the thickness. The function of the wave plate is demonstrated by sandwiching the tunable polarization converter between two identical right-handed circular polarized light reflective films with a wavelength around 770 nm. At low temperatures, this optical device reflects 50% of light at 770 nm, whereas at elevated temperature 81% is reflected. Such temperature-responsive optical devices have potential applications for both aesthetic purposes as well as energy saving windows.

Original languageEnglish
Article number1901103
Number of pages6
JournalAdvanced Optical Materials
Volume7
Issue number21
Early online date26 Aug 2019
DOIs
Publication statusPublished - 1 Nov 2019

Keywords

  • liquid crystals
  • polarization converter
  • semi-interpenetrating networks
  • temperature responsive
  • wave plates

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