Polarimetric analysis of cross-talk phenomena induced by the pixelation in PA-LCoS devices
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Título: | Polarimetric analysis of cross-talk phenomena induced by the pixelation in PA-LCoS devices |
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Autor/es: | Francés, Jorge | Márquez, Andrés | Neipp, Cristian | Puerto, Daniel | Gallego, Sergi | 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: | LCoS | Fringing field | Numerical analysis | Stokes polarimetry | Pixel crosstalk | LC director orientation |
Área/s de conocimiento: | Física Aplicada | Óptica |
Fecha de publicación: | 11-abr-2022 |
Editor: | Elsevier |
Cita bibliográfica: | Optics & Laser Technology. 2022, 152: 108125. https://doi.org/10.1016/j.optlastec.2022.108125 |
Resumen: | Liquid crystal on silicon (LCoS) microdisplays are an element commonly found in advanced photonic applications. Phase-only modulation and spatial light modulators (SLMs) use parallel-aligned LCoS (PA-LCoS) microdisplays due to their large resolution and small pixel size. However, the crosstalk between neighbouring pixels induces several phenomena, i.e. the smoothing of the electric field in the interpixel region known as fringing fields, out-of-plane reorientation of the liquid crystal director, and diffraction effects due to the finite pixel grid pattern. These effects degrade the performance in SLM applications. Therefore, a rigorous numerical analysis is carried out based on a full 3D model that estimates the LC director distribution of the PA-LCoS microdisplay through uniform applied voltages. Once the LC director distribution is known, a numerical finite-difference scheme simulates light propagation across the structure. Here, the impact of crosstalk is analysed from the polarimetric point of view for different pixel and interpixel sizes. It has been found that the finite-patterned pixel scheme induces the phenomena previously addressed, degrading the responses of the Stokes vector components S0, and S1 and also the degree of polarization (DOP). Furthermore, the impact over these parameters is generally inversely proportional to the fill factor. To isolate the influence of diffraction, out-of-plane, and fringing fields effects is challenging since all phenomena are mixed in both time and space, however we have found some useful trends. |
Patrocinador/es: | The work was supported by the “Ministerio de Ciencia e Innovación” of Spain (projects FIS2017-82919-R; PID2019-106601RB-I00), by the “Universidad de Alicante” (UATALENTO18-10;ACIE-20–10), and by Generalitat Valenciana (projects PROMETEO/2021/006, BEST/2021/021; IDIFEDER/2021/014, cofunded by European Union through the FEDER programme). |
URI: | http://hdl.handle.net/10045/122976 |
ISSN: | 0030-3992 (Print) | 1879-2545 (Online) |
DOI: | 10.1016/j.optlastec.2022.108125 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1016/j.optlastec.2022.108125 |
Aparece en las colecciones: | INV - GHPO - Artículos de Revistas |
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