Numerical Analysis of H-PDLC Using the Split-Field Finite-Difference Time-Domain Method
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...
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doaj-528cff76bcd74097ab2811bd8f48c7832020-11-24T22:41:32ZengMDPI AGPolymers2073-43602018-04-0110546510.3390/polym10050465polym10050465Numerical Analysis of H-PDLC Using the Split-Field Finite-Difference Time-Domain MethodSergio Bleda0Jorge Francés1Sergi Gallego2Andrés Márquez3Cristian Neipp4Inmaculada Pascual5Augusto Beléndez6Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Universidad de Alicante, P.O. Box 99, E-03080 Alicante, SpainInstituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Universidad de Alicante, P.O. Box 99, E-03080 Alicante, SpainInstituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Universidad de Alicante, P.O. Box 99, E-03080 Alicante, SpainInstituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Universidad de Alicante, P.O. Box 99, E-03080 Alicante, SpainInstituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Universidad de Alicante, P.O. Box 99, E-03080 Alicante, SpainInstituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Universidad de Alicante, P.O. Box 99, E-03080 Alicante, SpainInstituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Universidad de Alicante, P.O. Box 99, E-03080 Alicante, SpainIn 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.http://www.mdpi.com/2073-4360/10/5/465H-PDLCFDTDdiffraction efficiencyLD director distributionMonte Carlo |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sergio Bleda Jorge Francés Sergi Gallego Andrés Márquez Cristian Neipp Inmaculada Pascual Augusto Beléndez |
spellingShingle |
Sergio Bleda Jorge Francés Sergi Gallego Andrés Márquez Cristian Neipp Inmaculada Pascual Augusto Beléndez Numerical Analysis of H-PDLC Using the Split-Field Finite-Difference Time-Domain Method Polymers H-PDLC FDTD diffraction efficiency LD director distribution Monte Carlo |
author_facet |
Sergio Bleda Jorge Francés Sergi Gallego Andrés Márquez Cristian Neipp Inmaculada Pascual Augusto Beléndez |
author_sort |
Sergio Bleda |
title |
Numerical Analysis of H-PDLC Using the Split-Field Finite-Difference Time-Domain Method |
title_short |
Numerical Analysis of H-PDLC Using the Split-Field Finite-Difference Time-Domain Method |
title_full |
Numerical Analysis of H-PDLC Using the Split-Field Finite-Difference Time-Domain Method |
title_fullStr |
Numerical Analysis of H-PDLC Using the Split-Field Finite-Difference Time-Domain Method |
title_full_unstemmed |
Numerical Analysis of H-PDLC Using the Split-Field Finite-Difference Time-Domain Method |
title_sort |
numerical analysis of h-pdlc using the split-field finite-difference time-domain method |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2018-04-01 |
description |
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. |
topic |
H-PDLC FDTD diffraction efficiency LD director distribution Monte Carlo |
url |
http://www.mdpi.com/2073-4360/10/5/465 |
work_keys_str_mv |
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