Circular polarization interferometry: circularly polarized modes of cholesteric 
liquid crystals

Sanchez-Castillo, A.; Eslami, Sahand; Giesselmann, F.; Fischer, Peer

doi:10.1364/OE.22.031227

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Circular polarization interferometry: circularly polarized modes of cholesteric liquid crystals

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Fischer, Peer
Max Planck Institute for Medical Research, Max Planck Society;

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Citation

Sanchez-Castillo, A., Eslami, S., Giesselmann, F., & Fischer, P. (2014). Circular polarization interferometry: circularly polarized modes of cholesteric liquid crystals. Optics Express, 22(25), 31227-31236. doi:10.1364/OE.22.031227.

Cite as: https://hdl.handle.net/21.11116/0000-000B-06BB-C

Abstract

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.