Analysis of holographic polymer-dispersed liquid crystals (HPDLCs) for tunable low frequency diffractive optical elements recording

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Title: Analysis of holographic polymer-dispersed liquid crystals (HPDLCs) for tunable low frequency diffractive optical elements recording
Authors: Fernandez, Roberto | Gallego, Sergi | Márquez, Andrés | Francés, Jorge | Martínez Guardiola, Francisco Javier | 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: Photopolymer | Holographic polymer dispersed liquid crystals | Diffractive optical elements | Spatial light modulators
Knowledge Area: Óptica | Física Aplicada
Date Created: 27-Jul-2017
Issue Date: 1-Feb-2018
Publisher: Elsevier
Citation: Optical Materials. 2018, 76: 295-301. doi:10.1016/j.optmat.2017.12.045
Abstract: Holographic polymer dispersed liquid crystals (HPDLCs) are the result of the optimization of the photopolymer fabrication techniques. They are made by recording in a photopolymerization induced phase separation process (PIPS) in which the liquid crystal molecules diffuse to dark zones in the diffraction grating originated. Thanks to the addition of liquid crystal molecules to the composition, this material has a dynamic behavior by reorientation of the liquid crystal molecules applying an electrical field. In this sense, it is possible to use this material to make dynamic devices. In this work, we study the behavior of this material working in low frequencies with different spatial periods of blazed gratings, a sharp profile whose recording is possible thanks to the addition of a Holoeye LCoS-Pluto spatial light modulator with a resolution of 1920 × 1080 pixels (HD) and a pixel size of 8 × 8 μm2. This device allows us to have an accurate and dynamic control of the phase and amplitude of the recording beam.
Sponsor: This work was supported by the “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).
ISSN: 0925-3467 (Print) | 1873-1252 (Online)
DOI: 10.1016/j.optmat.2017.12.045
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 Elsevier B.V.
Peer Review: si
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