Influence of the spatial frequency on the diffractive optical elements fabrication in PDLCs

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Title: Influence of the spatial frequency on the diffractive optical elements fabrication in PDLCs
Authors: Fernandez, Roberto | Fenoll Gambín, Sandra | Gallego, Sergi | Márquez, Andrés | Francés, Jorge | Navarro-Fuster, Víctor | Beléndez, Augusto | Pascual, Inmaculada
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: Holography | Holographic recording materials | Diffractive optical elements | Photopolymers | Spatial light modulators | HPDLC
Knowledge Area: Óptica | Física Aplicada
Date Created: 1-Jun-2016
Issue Date: 14-Sep-2016
Publisher: SPIE, The International Society for Optics and Photonics
Citation: R. Fernández ; S. Fenoll ; S. Gallego ; A. Márquez ; J. Francés ; V. Navarro Fuster ; A. Beléndez and I. Pascual " Influence of the spatial frequency on the diffractive optical elements fabrication in PDLCs ", Proc. SPIE 9970, Optics and Photonics for Information Processing X, 997019 (September 14, 2016); doi:10.1117/12.2236302
Abstract: Photopolymers are classical holographic recording materials. Recently their chemical composition and the fabrication techniques have been optimized for many new applications such as interconnectors, solar concentrations, 2-D photonic structures, or wave-guides. Their potential usefulness has been drastically increased by the introduction of dispersed liquid crystal molecules; these components can be concentrated in the non-exposed zones of the material by a photopolymerization induced phase separation process (PIPS). Therefore, by combining polymer and dispersed liquid crystal (PDLC) has emerged as a new composite material for switchable diffractive optical elements (DOEs). Parallel to the material advances some techniques have been proposed to record very low spatial frequencies DOE’s. Different researchers have reported proposes to record DOE like fork gratings, photonics structures, lenses, sinusoidal, blazed or fork gratings. In this work we have studied the behavior of a PDLC material to record DOE’s with different spatial periods: from 1 μm, using holographic technique, to more than 200 μm, Liquid Cristal on Silicon (LCoS) display working in mostly amplitude mode as a master. Due to the improvement in the spatial light modulation technology and the pixel miniaturization, this technique permits us store gratings with spatial frequencies until few microns. Additionally, this technology permits us an accurate and dynamic control of the phase and the amplitude of the recording beam. In particular, for our case, to generate the blazed gratings, we use an LCoS-Pluto provided by Holoeye with a resolution of 1920x1080 (HDTV) pixels and a pixel size of 7.7x7.7 m2.
Sponsor: Work supported by the Ministerio de Economía y Competitividad of Spain under project FIS2014-56100-C2-1-P and FIS2015-66570-P and by the Generalitat Valenciana of Spain (projects PROMETEOII/2015/015 and ISIC/2012/013)
ISBN: 9781510603318 | 9781510603325 (Online)
ISSN: 0277-786X | 1996-756X (Online)
DOI: 10.1117/12.2236302
Language: eng
Type: info:eu-repo/semantics/conferenceObject
Rights: Copyright 2016 Society of Photo-Optical Instrumentation Engineers. This paper was published in Proceedings of SPIE, vol. 9970, 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.
Peer Review: si
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