Remarkable optics of short-pitch deformed helix ferroelectric liquid crystals: symmetries, exceptional points and polarization-resolved angular patterns

Abstract

In order to explore electric-field-induced transformations of polarization singularities in the polarization-resolved angular (conoscopic) patterns emerging after deformed helix ferroelectric liquid crystal (DHFLC) cells with subwavelength helix pitch, we combine the transfer matrix formalism with the results for the effective dielectric tensor of biaxial FLCs evaluated using an improved technique of averaging over distorted helical structures. Within the framework of the transfer matrix method, we deduce a number of symmetry relations and show that the symmetry axis of L lines (curves of linear polarization) is directed along the major in-plane optical axis which rotates under the action of the electric field. When the angle between this axis and the polarization plane of incident linearly polarized light is above its critical value, the C points (points of circular polarization) appear in the form of symmetrically arranged chains of densely packed star-monstar pairs. We also emphasize the role of phase singularities of a different kind and discuss the enhanced electro-optic response of DHFLCs near the exceptional point where the condition of zero-field isotropy is fulfilled.

arXiv comment36 pages, 14 figures

References in corpus (7)

• Unidirectional Invisibility induced by PT-Symmetric Periodic Structures
• Repulsion of Resonance States and Exceptional Points
• Polarization singularity anisotropy: determining monstardom
• Orientational "Kerr effect" and phase modulation of light in deformed-helix ferroelectric liquid crystals with subwavelength pitch
• Enhanced Kerr effect in vertically aligned deformed helix ferroelectric liquid crystals
• Polarization resolved angular patterns in nematic liquid crystal cells
• Conoscopic patterns in photonic band gap of cholesteric liquid crystal cells with twist defects

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• Chiral Optical Tamm States: Temporal Coupled-Mode Theory
• Geometric phase and o-mode blue shift in a chiral anisotropic medium inside a Fabry-Pérot cavity
• Effective dielectric tensor of deformed-helix ferroelectric liquid crystals with subwavelength pitch and large tilt angle
• Exceptional compound plasmon-polariton waves
• Interferometric and Uhlmann phases of mixed polarization states