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Polymers 2018, 10(5), 465; https://doi.org/10.3390/polym10050465

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

1
Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Universidad de Alicante, P.O. Box 99, E-03080 Alicante, Spain
2
Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal, Universidad de Alicante, P.O. Box 99, E-03080 Alicante, Spain
3
Departamento de Óptica, Anatomía y Farmacología, Universidad de Alicante, P.O. Box 99, E-03080 Alicante, Spain
*
Author to whom correspondence should be addressed.
Received: 4 April 2018 / Revised: 19 April 2018 / Accepted: 23 April 2018 / Published: 24 April 2018
(This article belongs to the Special Issue Holographic Materials and Photonic Applications)
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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. View Full-Text
Keywords: H-PDLC; FDTD; diffraction efficiency; LD director distribution; Monte Carlo H-PDLC; FDTD; diffraction efficiency; LD director distribution; Monte Carlo
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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, 465.

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