Electrically controlled birefringence colours in deformed helix ferroelectric liquid crystals

Hegde, Gurumurthy; Xu, Peizhi; Pozhidaev, E. P.; Chigrinov, Vladimir G.; Kwok, Hoi‐Sing

doi:10.1080/02678290802398226

Cited by 29 publications

(38 citation statements)

References 23 publications

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“…E E c , the azimuthal angle around the cone, , can be written in the form [30,32,35] = φ + (φ) ≈ φ + α E sin φ, φ = 2π P x, (40) where the electric field induced distortion linearly depends on E through the electric field parameter α E proportional to the ratio of the applied and critical electric fields: E/E c .…”

Section: Physical Review E 83 031703 (2011)mentioning

confidence: 99%

“…Then computing the transmission and the reflection matrices (30) involve the following steps: (a) evaluation of the linking matrix (33); (b) calculation of the efficiency matrices (35) by solving the system of linear equation (34); (c) computing the matrices T n and R n from the formulas (37) and (38), respectively.…”

Section: Physical Review E 83 031703 (2011)mentioning

confidence: 99%

“…Electro-optical response of DHFLC cells exhibits a number of peculiarities that make them useful for LC devices such as high-speed spatial light modulators [32][33][34] and colorsequential LC display cells [35]. So, in this study, our goal is to examine electro-optical properties of DHFLCs based on the general theoretical approach describing PGs.…”

Section: Introductionmentioning

confidence: 99%

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Polarization-gratings approach to deformed-helix ferroelectric liquid crystals with subwavelength pitch

et al. 2011

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Electro-optical properties of deformed helix ferroelectric liquid crystal (DHFLC) cells are studied by using a general theoretical approach to polarization gratings in which the transmission and reflection matrices of diffraction orders are explicitly related to the evolution operator of equations for the Floquet harmonics. In the short-pitch approximation, a DHFLC cell is shown to be optically equivalent to a uniformly anisotropic biaxial layer where one of the optical axes is normal to the bounding surfaces. For in-plane anisotropy, orientation of the optical axes and birefringence are both determined by the voltage applied across the cell and represent the parameters that govern the transmittance of normally incident light passing through crossed polarizers. We calculate the transmittance as a function of the electric field and compare the computed curves with the experimental data. The theoretical and experimental results are found to be in good agreement.

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Section: Physical Review E 83 031703 (2011)mentioning

confidence: 99%

Section: Physical Review E 83 031703 (2011)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Polarization-gratings approach to deformed-helix ferroelectric liquid crystals with subwavelength pitch

et al. 2011

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“…(3)] and represents the undistorted structure. For sufficiently small electric fields, the standard perturbative technique applied to the Euler-Lagrange equation gives the first-order expression [10,23] for the azimuthal angle of a weakly distorted helical structure…”

Section: A Effective Dielectric Tensormentioning

confidence: 99%

“…Electro-optical response of DHFLC cells exhibits a number of peculiarities that make them useful for LC devices such as high-speed spatial light modulators [5][6][7][8][9], color-sequential liquid crystal display cells [10], and optic fiber sensors [11]. The effects caused by electric-field-induced distortions of the helical structure underline the mode of operation of such cells.…”

Section: Introductionmentioning

confidence: 99%

Optics of short-pitch deformed-helix ferroelectric liquid crystals: Symmetries, exceptional points, and polarization-resolved angular patterns

Kiselev

Chigrinov

2014

Phys. Rev. E

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In order to explore electric-field-induced transformations of polarization singularities in the polarizationresolved 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.

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Electro‐optical Modes: Practical Examples of LCD Modeling and Optimization

2015

Modeling and Optimization of LCD Optical Performance

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Electrically controlled birefringence colours in deformed helix ferroelectric liquid crystals

Cited by 29 publications

References 23 publications

Polarization-gratings approach to deformed-helix ferroelectric liquid crystals with subwavelength pitch

Polarization-gratings approach to deformed-helix ferroelectric liquid crystals with subwavelength pitch

Optics of short-pitch deformed-helix ferroelectric liquid crystals: Symmetries, exceptional points, and polarization-resolved angular patterns

Electro‐optical Modes: Practical Examples of LCD Modeling and Optimization

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