SF-FDTD analysis of a predictive physical model for parallel aligned liquid crystal devices
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Título: | SF-FDTD analysis of a predictive physical model for parallel aligned liquid crystal devices |
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Autor/es: | Márquez, Andrés | Francés, Jorge | Martínez Guardiola, Francisco Javier | Gallego, Sergi | Alvarez, Mariela L. | Calzado Estepa, Eva María | Pascual, Inmaculada | Beléndez, Augusto |
Grupo/s de investigación o GITE: | Holografía y Procesado Óptico |
Centro, Departamento o Servicio: | 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 |
Palabras clave: | Liquid-crystal devices | Parallel-aligned | Birefringence | Spatial light modulators | Displays | Finite-Difference Time-Domain | Split-Field |
Área/s de conocimiento: | Óptica | Física Aplicada |
Fecha de creación: | 30-jun-2017 |
Fecha de publicación: | 12-sep-2017 |
Editor: | SPIE, The International Society for Optics and Photonics |
Cita bibliográfica: | Andrés Márquez; Jorge Francés; Francisco J. Martínez; Sergi Gallego; Mariela L. Álvarez; Eva M. Calzado; Inmaculada Pascual; Augusto Beléndez. SF-FDTD analysis of a predictive physical model for parallel aligned liquid crystal devices. Proc. SPIE 10395, Optics and Photonics for Information Processing XI, 1039509 (12 September 2017); doi: 10.1117/12.2273924 |
Resumen: | Recently we demonstrated a novel and simplified model enabling to calculate the voltage dependent retardance provided by parallel aligned liquid crystal devices (PA-LCoS) for a very wide range of incidence angles and any wavelength in the visible. To our knowledge it represents the most simplified approach still showing predictive capability. Deeper insight into the physics behind the simplified model is necessary to understand if the parameters in the model are physically meaningful. Since the PA-LCoS is a black-box where we do not have information about the physical parameters of the device, we cannot perform this kind of analysis using the experimental retardance measurements. In this work we develop realistic simulations for the non-linear tilt of the liquid crystal director across the thickness of the liquid crystal layer in the PA devices. We consider these profiles to have a sine-like shape, which is a good approximation for typical ranges of applied voltage in commercial PA-LCoS microdisplays. For these simulations we develop a rigorous method based on the split-field finite difference time domain (SF-FDTD) technique which provides realistic retardance values. These values are used as the experimental measurements to which the simplified model is fitted. From this analysis we learn that the simplified model is very robust, providing unambiguous solutions when fitting its parameters. We also learn that two of the parameters in the model are physically meaningful, proving a useful reverse-engineering approach, with predictive capability, to probe into internal characteristics of the PA-LCoS device. |
Patrocinador/es: | Work supported by Ministerio de Economía, Industria y Competitividad (Spain) (FIS2014-56100-C2-1-P and FIS2015- 66570-P) and by Generalitat Valenciana (Spain) (PROMETEO II/2015/015). |
URI: | http://hdl.handle.net/10045/69447 |
ISBN: | 9781510612471 |
ISSN: | 0277-786X | 1996-756X (Online) |
DOI: | 10.1117/12.2273924 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | Copyright 2017 Society of Photo-Optical Instrumentation Engineers. This paper was published in Proceedings of SPIE, vol. 10395, and is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1117/12.2273924 |
Aparece en las colecciones: | INV - GHPO - Comunicaciones a Congresos, Conferencias, etc. INV - GHPO - Artículos de Revistas |
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