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Volume Holograms in Photopolymers: Comparison between Analytical and Rigorous Theories

There is no doubt that the concept of volume holography has led to an incredibly great amount of scientific research and technological applications. One of these applications is the use of volume holograms as optical memories, and in particular, the use of a photosensitive medium like a photopolymer...

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Autores principales: Gallego, Sergi, Neipp, Cristian, Estepa, Luis A., Ortuño, Manuel, Márquez, Andrés, Francés, Jorge, Pascual, Inmaculada, Beléndez, Augusto
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5448931/
http://dx.doi.org/10.3390/ma5081373
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author Gallego, Sergi
Neipp, Cristian
Estepa, Luis A.
Ortuño, Manuel
Márquez, Andrés
Francés, Jorge
Pascual, Inmaculada
Beléndez, Augusto
author_facet Gallego, Sergi
Neipp, Cristian
Estepa, Luis A.
Ortuño, Manuel
Márquez, Andrés
Francés, Jorge
Pascual, Inmaculada
Beléndez, Augusto
author_sort Gallego, Sergi
collection PubMed
description There is no doubt that the concept of volume holography has led to an incredibly great amount of scientific research and technological applications. One of these applications is the use of volume holograms as optical memories, and in particular, the use of a photosensitive medium like a photopolymeric material to record information in all its volume. In this work we analyze the applicability of Kogelnik’s Coupled Wave theory to the study of volume holograms recorded in photopolymers. Some of the theoretical models in the literature describing the mechanism of hologram formation in photopolymer materials use Kogelnik’s theory to analyze the gratings recorded in photopolymeric materials. If Kogelnik’s theory cannot be applied is necessary to use a more general Coupled Wave theory (CW) or the Rigorous Coupled Wave theory (RCW). The RCW does not incorporate any approximation and thus, since it is rigorous, permits judging the accurateness of the approximations included in Kogelnik’s and CW theories. In this article, a comparison between the predictions of the three theories for phase transmission diffraction gratings is carried out. We have demonstrated the agreement in the prediction of CW and RCW and the validity of Kogelnik’s theory only for gratings with spatial frequencies higher than 500 lines/mm for the usual values of the refractive index modulations obtained in photopolymers.
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spelling pubmed-54489312017-07-28 Volume Holograms in Photopolymers: Comparison between Analytical and Rigorous Theories Gallego, Sergi Neipp, Cristian Estepa, Luis A. Ortuño, Manuel Márquez, Andrés Francés, Jorge Pascual, Inmaculada Beléndez, Augusto Materials (Basel) Article There is no doubt that the concept of volume holography has led to an incredibly great amount of scientific research and technological applications. One of these applications is the use of volume holograms as optical memories, and in particular, the use of a photosensitive medium like a photopolymeric material to record information in all its volume. In this work we analyze the applicability of Kogelnik’s Coupled Wave theory to the study of volume holograms recorded in photopolymers. Some of the theoretical models in the literature describing the mechanism of hologram formation in photopolymer materials use Kogelnik’s theory to analyze the gratings recorded in photopolymeric materials. If Kogelnik’s theory cannot be applied is necessary to use a more general Coupled Wave theory (CW) or the Rigorous Coupled Wave theory (RCW). The RCW does not incorporate any approximation and thus, since it is rigorous, permits judging the accurateness of the approximations included in Kogelnik’s and CW theories. In this article, a comparison between the predictions of the three theories for phase transmission diffraction gratings is carried out. We have demonstrated the agreement in the prediction of CW and RCW and the validity of Kogelnik’s theory only for gratings with spatial frequencies higher than 500 lines/mm for the usual values of the refractive index modulations obtained in photopolymers. MDPI 2012-08-15 /pmc/articles/PMC5448931/ http://dx.doi.org/10.3390/ma5081373 Text en © 2012 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Gallego, Sergi
Neipp, Cristian
Estepa, Luis A.
Ortuño, Manuel
Márquez, Andrés
Francés, Jorge
Pascual, Inmaculada
Beléndez, Augusto
Volume Holograms in Photopolymers: Comparison between Analytical and Rigorous Theories
title Volume Holograms in Photopolymers: Comparison between Analytical and Rigorous Theories
title_full Volume Holograms in Photopolymers: Comparison between Analytical and Rigorous Theories
title_fullStr Volume Holograms in Photopolymers: Comparison between Analytical and Rigorous Theories
title_full_unstemmed Volume Holograms in Photopolymers: Comparison between Analytical and Rigorous Theories
title_short Volume Holograms in Photopolymers: Comparison between Analytical and Rigorous Theories
title_sort volume holograms in photopolymers: comparison between analytical and rigorous theories
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5448931/
http://dx.doi.org/10.3390/ma5081373
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