Sensitivity enhancement in panchromatic photopolymers for holography using a mixture of visible-light photoinitiators

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Título: Sensitivity enhancement in panchromatic photopolymers for holography using a mixture of visible-light photoinitiators
Autor/es: Fimia Gil, Antonio | Mateos Álvarez, Felipe | Beléndez, Augusto | Sastre Muñoz, Roberto | Amat Guerri, Francisco
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 Miguel Hernández. Departamento de Ciencia de Materiales, Óptica y Tecnología Electrónica | Instituto de Ciencia y Tecnología de Polímeros | Instituto de Química Orgánica General
Palabras clave: Holography | Holographic recording materials | Photopolymers
Área/s de conocimiento: Óptica | Física Aplicada | Química Orgánica
Fecha de creación: 1996
Fecha de publicación: 20-dic-1996
Editor: SPIE, The International Society for Optical Engineering
Cita bibliográfica: FIMIA GIL, Antonio, et al. "Sensitivity enhancement in panchromatic photopolymers for holography using a mixture of visible-light photoinitiators". En: Holographic and diffractive techniques : 9-11 October 1996, Berlin, FRG. Bellingham, Wash. : SPIE, 1996. (Proceedings of SPIE; Vol. 2951). ISBN 978-0-81942-355-9, pp. 69-73
Resumen: Photopolymers usually present lower energetic sensitivity, and to narrower wavelength range, than other more conventional recording materials for holography such as dichromated gelatins. We have previously overcome some of these disadvantages using a mixture of visible light photoinitiators. In present communication we describe a new aqueous photopolymer containing the monomers, methylenbisacrylamide and zinc acrylate, the initiators 4,5- diiodosuccinyfluoroscein (2ISF) and methylene blue (MB), and the coinitiator sodium p-toluensulfinate. This formulation exhibits a dramatic enhancement of the energetic sensitivity upon radiation with 514 or 633 nm light (Ar or He-Ne laser respectively), with regard to the same mixture but with only one dye, reaching maximum diffraction efficiencies of 15 - 20% with 15 - 60 mJ cm-2. This enhancement is explained through a more efficient photogeneration of initiator radicals by the ground-state formation of on ion- pair complex between cationic (MB) and anionic (2ISF) chromophores, the proximity of which must favor electron transfer between groups. This must compensate the observed absorbance decrease at 514 nm, with regard to the absorbance of 2ISF alone in the same medium (maximum absorption at 490 nm). A clear absorbance increase at 633 nm, with regard to the absorbance of MB alone (maximum absorption at 660 nm), must also favor the photopolymerization.
Patrocinador/es: This work was partially supported by the CICYT, Spain, under projects MAT93-0369 and MAT96-1767-E.
URI: http://hdl.handle.net/10045/9378
ISBN: 978-0-81942-355-9
ISSN: 0277-786X
DOI: 10.1117/12.262423
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: Copyright 1996 Society of Photo-Optical Instrumentation Engineers. This paper was published in Proceedings of SPIE, vol. 2951, 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.
Revisión científica: si
Versión del editor: http://dx.doi.org/10.1117/12.262423
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