Light transmission of polymer-dispersed liquid crystal layer composed of droplets with inhomogeneous surface anchoring
| Autor: | V. Ya. Zyryanov, Valery A. Loiko, Alexander A. Miskevich, A. V. Konkolovich |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Materials science Field (physics) Scattering business.industry Dispersity 02 engineering and technology Polymer 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Condensed Matter::Soft Condensed Matter Optics chemistry Liquid crystal 0103 physical sciences Particle Transmission coefficient Photonics 010306 general physics 0210 nano-technology business |
| Zdroj: | Optics and Spectroscopy. 120:143-152 |
| ISSN: | 1562-6911 0030-400X |
| DOI: | 10.1134/s0030400x16010112 |
| Popis: | We have developed a model and realized an algorithm for the calculation of the coefficient of coherent (direct) transmission of light through a layer of liquid crystal (LC) droplets in a polymer matrix. The model is based on the Hulst anomalous diffraction approximation for describing the scattering by an individual particle and the Foldy-Twersky approximation for a coherent field. It allows one to investigate polymer dispersed LC (PDLC) materials with homogeneous and inhomogeneous interphase surface anchoring on the droplet surface. In order to calculate the configuration of the field of the local director in the droplet, the relaxation method of solving the problem of minimization of the free energy volume density has been used. We have verified the model by comparison with experiment under the inverse regime of the ionic modification of the LC-polymer interphase boundary. The model makes it possible to solve problems of optimization of the optical response of PDLC films in relation to their thickness and optical characteristics of the polymer matrix, sizes, polydispersity, concentration, and anisometry parameters of droplets. Based on this model, we have proposed a technique for estimating the size of LC droplets from the data on the dependence of the transmission coefficient on the applied voltage. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|