Abstract
The differential and total light scattering cross sections by LCs which contain hard macroscopic spherical and cylindrical particles are theoretically studied using the anomalous-diffraction approach. The influence of form and size of particles, the type and strength of director anchoring on the particle surface as well as light wave polarization on the light scattering is analysed
Highlights
IntroductionIn the cells of nematic liquid crystals (LCs) filled with small hard particles (briefly, in filled liquid crystals – FLCs) one can observe intensive light scattering on inhomogeneities of director field caused by the particles [1]
In the cells of nematic liquid crystals (LCs) filled with small hard particles one can observe intensive light scattering on inhomogeneities of director field caused by the particles [1]
In papers [3,4] we considered the light scattering cross sections by FLCs in Rayleigh-Gans approximation which is applicable in the case of director inhomogeneities with characteristic size Rch < λ, where λ is the wavelength of light
Summary
In the cells of nematic liquid crystals (LCs) filled with small hard particles (briefly, in filled liquid crystals – FLCs) one can observe intensive light scattering on inhomogeneities of director field caused by the particles [1]. If the external permanent electric field is properly switched on the director field, distortions decrease and lead to the decrease of light scattering and to the increase of nematic cell transparency Due to this effect the FLCs are very perspective media for applications in displays and in other optoelectronic devices [2]. In present paper we consider the light scattering in FLCs in the opposite case Rch > λ which takes place for particles of large size or for strong director anchoring on the particle surface when the disclination arises near the particle. In this case the light scattering can be treated within the anomalous-diffraction approach (ADA) [5].
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