Patterned cholesteric liquid crystal polymer film

Wei Liang Hsu, Ji Ma, Graham Myhre, Kaushik Balakrishnan, Stanley Pau

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Herein, the ability to create arbitrarily patterned circular polarized optical devices is demonstrated by using cholesteric liquid crystal polymer. Photoalignment with polarized ultraviolet light is utilized to create aligned cholesteric liquid crystal films. Two different methods, thermal annealing and solvent rinse, are utilized for patterning cholesteric liquid crystal films over large areas. The patterned cholesteric liquid crystal films are measured using a Mueller matrix imaging polarimeter, and the polarization properties, including depolarization index, circular diattenuation (CD), and circular retardance are derived. Patterned nonlinearly polarized optical devices can be fabricated with feature sizes as small as 20 μm with a CD of 0.812 ± 0.015. Circular polarizing filters based on polymer cholesteric liquid crystal films have applications in three-dimensional displays, medical imaging, polarimetry, and interferometry.

Original languageEnglish (US)
Pages (from-to)252-258
Number of pages7
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Volume30
Issue number2
DOIs
StatePublished - Feb 2013

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Computer Vision and Pattern Recognition

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