Depth attenuated refractive index profiles in holographic gratings recorded in photopolymer materials

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Title: Depth attenuated refractive index profiles in holographic gratings recorded in photopolymer materials
Authors: Gallego, Sergi | Ortuño, Manuel | Neipp, Cristian | Márquez, Andrés | Sheridan, John T. | 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 | University College Dublin. Departament of Electronic and Electrical Engineering
Keywords: Holography | Holographic recording materials | Holographic gratings | Photopolymers | Volume holograms
Knowledge Area: Óptica | Física Aplicada
Date Created: 2004
Issue Date: 1-Sep-2004
Publisher: SPIE, The International Society for Optical Engineering
Citation: GALEGO RICO, Sergi, et al. "Depth attenuated refractive index profiles in holographic gratings recorded in photopolymer materials". En: Photon management : 27-28 April 2004, Strasbourg, France / Frank Wyrowski, chair-editor. Bellingham, Wash. : SPIE, 2004. (Proceedings of SPIE; Vol. 5456). ISBN 978-0-81945-383-9, pp. 449-459
Abstract: Photopolymers are systems of organic molecules that rely on photoinitiated polymerization to record volume phase holograms. Characteristics such as good light sensitivity, large dynamic range, good optical properties and relatively low cost make photopolymers one of the most promising materials for write-one, read-many (WORM) holographic data storage applications. Thus, it is interesting to understand the mechanisms that control the way information is stored in photopolymer materials. Different authors have demonstrated that two processes play the main role in hologram formation: monomer polymerization and monomer diffusion. A number of models based on these two processes have been proposed and their prediction capability has been validated. In this work we extend the capabilities of the existent models by introducing another important characteristic: the attenuation of light through the depth of the material which happens in the recording process. In order to check the validity of the theoretical model that we propose, volume phase transmission gratings are recorded in a PVA/Acrylamide photopolymer with different spatial frequencies. Using the Rigorous Coupled Wave Theory (RCWT) we show that we can obtain information about the higher harmonics in the recorded refractive index modulation. Comparison between simulated and experimental results validates the interpretation provided by the proposed model.
Sponsor: This work was supported by the "Ministerio de Ciencia y Tecnología", CICYT, Spain, under project MAT2000-1361-C04-04.
ISBN: 978-0-81945-383-9
ISSN: 0277-786X
DOI: 10.1117/12.545812
Language: eng
Type: info:eu-repo/semantics/article
Rights: Copyright 2004 Society of Photo-Optical Instrumentation Engineers. This paper was published in Proceedings of SPIE, vol. 5456, 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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