Circular polarization interferometry: circularly polarized modes of cholesteric liquid crystals | Zendy

A. Sanchez-Castillo | Zendy; Sahand Eslami | Zendy; Frank Gießelmann | Zendy; Peer Fischer | Zendy

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Circular polarization interferometry: circularly polarized modes of cholesteric liquid crystals

Author(s) -

A. Sanchez-Castillo,

Sahand Eslami,

Frank Gießelmann,

Peer Fischer

Publication year - 2014

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.031227

Subject(s) - optics , interferometry , circular polarization , birefringence , polarization (electrochemistry) , refractive index , liquid crystal , optical rotation , cholesteric liquid crystal , materials science , physics , chemistry , microstrip

We describe a novel polarization interferometer which permits the determination of the refractive indices for circularly-polarized light. It is based on a Jamin-Lebedeff interferometer, modified with waveplates, and permits us to experimentally determine the refractive indices nL and nR of the respectively left- and right-circularly polarized modes in a cholesteric liquid crystal. Whereas optical rotation measurements only determine the circular birefringence, i.e. the difference (nL - nR), the interferometer also permits the determination of their absolute values. We report refractive indices of a cholesteric liquid crystal in the region of selective (Bragg) reflection as a function of temperature.

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