A polarization independent liquid crystal phase modulation adopting surface pinning effect of polymer dispersed liquid crystals

Yi-Hsin Lin*, Yu Shih Tsou

*Corresponding author for this work

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

A polarization-independent liquid crystal (LC) phase modulation using the surface pinning effect of polymer dispersed liquid crystals (SP-PDLC) is demonstrated. In the bulk region of the SP-PDLC, the orientations of LC directors are randomly dispersed; thus, any polarization of incident light experiences the same averaged refractive index. In the regions near glass substrates, the LC droplets are pinned. The orientations of top and bottom droplets are orthogonal. Two eigen-polarizations of an incident light experience the same phase shift. As a result, the SP-PDLC is polarization independent. Polarizer-free microlens arrays of SP-PDLC are also demonstrated. The SP-PDLC has potential for application in spatial light modulators, laser beam steering, and electrically tunable microprisms.

Original languageEnglish
Article number114516
JournalJournal of Applied Physics
Volume110
Issue number11
DOIs
StatePublished - 1 Dec 2011

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