Numerical Analysis of H-PDLC Using the Split-Field Finite-Difference Time-Domain Method

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Title: Numerical Analysis of H-PDLC Using the Split-Field Finite-Difference Time-Domain Method
Authors: Bleda, Sergio | Francés, Jorge | Gallego, Sergi | Márquez, Andrés | Neipp, Cristian | Pascual, Inmaculada | Beléndez, Augusto
Research Group/s: Holografía y Procesado Óptico
Center, Department or Service: Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía | Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías
Keywords: H-PDLC | FDTD | Diffraction efficiency | LD director distribution | Monte Carlo
Knowledge Area: Física Aplicada | Óptica
Date Created: 4-Apr-2018
Issue Date: 24-Apr-2018
Publisher: MDPI
Citation: Bleda S, Francés J, Gallego S, Márquez A, Neipp C, Pascual I, Beléndez A. Numerical Analysis of H-PDLC Using the Split-Field Finite-Difference Time-Domain Method. Polymers. 2018; 10(5):465. doi:10.3390/polym10050465
Abstract: In this work, an accurate numerical modeling of the diffraction properties of transmission holographic polymer dispersed liquid crystal (H-PDLC) gratings is presented. The method considers ellipsoid geometry-based liquid crystal (LC) droplets with random properties regarding size and location across the H-PLDC layer and also the non-homogeneous orientation of the LC director within the droplet. The direction of the LC director inside the droplets can be varied to reproduce the effects of the external voltage applied in H-PDLC-based gratings. From the LC director distribution in the droplet, the permittivity tensor is defined, which establishes the optical anisotropy of the media, and it is used for numerically solving the light propagation through the system. In this work, the split-field finite-difference time-domain method (SF-FDTD) is applied. This method is suited for accurately analyzing periodic media, and it considers spatial and time discretisation of Maxwell’s equations. The scheme proposed here is used to investigate the influence on the diffraction properties of H-PDLC as a function of the droplets size and the bulk fraction of LC dispersed material.
Sponsor: Work supported by Ministerio de Economía, Industria y Competitividad of Spain under projects FIS2017-82919-R (MINECO/AEI/FEDER) and FIS2015-66570-P (Mineco/FEDER) and by Generalitat Valenciana of Spain under project PROMETEO II/2015/015.
URI: http://hdl.handle.net/10045/75230
ISSN: 2073-4360
DOI: 10.3390/polym10050465
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Peer Review: si
Publisher version: https://doi.org/10.3390/polym10050465
Appears in Collections:INV - GHPO - Artículos de Revistas

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