Influence of 4,4’-azobis (4-cyanopentanoic acid) in Transmission and Reflection Gratings Stored in a PVA/AA Photopolymer
Holographic transmission gratings with a spatial frequency of 2658 lines/mm and reflection gratings with a spatial frequency of 4553 lines/mm were stored in a polyvinyl alcohol (PVA)/acrylamide (AA) based photopolymer. This material can reach diffraction efficiencies close to 100% for spatial freque...
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doaj-5756c35426854386b298748fa96669b72020-11-24T23:13:41ZengMDPI AGMaterials1996-19442016-03-019319410.3390/ma9030194ma9030194Influence of 4,4’-azobis (4-cyanopentanoic acid) in Transmission and Reflection Gratings Stored in a PVA/AA PhotopolymerElena Fernandez0Rosa Fuentes1Augusto Belendez2Inmaculada Pascual3Dep. Optica, Farmacología y Anatomía, Universidad de Alicante, Apartado de correos 99, Alicante E-03080, SpainDep. Optica, Farmacología y Anatomía, Universidad de Alicante, Apartado de correos 99, Alicante E-03080, SpainDep. Física, Ingeniería de Sistemas y Tª de la Señal, Universidad de Alicante, Apartado de correos 99, Alicante E-03080, SpainDep. Optica, Farmacología y Anatomía, Universidad de Alicante, Apartado de correos 99, Alicante E-03080, SpainHolographic transmission gratings with a spatial frequency of 2658 lines/mm and reflection gratings with a spatial frequency of 4553 lines/mm were stored in a polyvinyl alcohol (PVA)/acrylamide (AA) based photopolymer. This material can reach diffraction efficiencies close to 100% for spatial frequencies about 1000 lines/mm. However, for higher spatial frequencies, the diffraction efficiency decreases considerably as the spatial frequency increases. To enhance the material response at high spatial frequencies, a chain transfer agent, the 4,4’-azobis (4-cyanopentanoic acid), ACPA, is added to the composition of the material. Different concentrations of ACPA are incorporated into the main composition of the photopolymer to find the concentration value that provides the highest diffraction efficiency. Moreover, the refractive index modulation and the optical thickness of the transmission and reflection gratings were obtained, evaluated and compared to procure more information about the influence of the ACPA on them.http://www.mdpi.com/1996-1944/9/3/194holographyphotopolymersholographic recording materials |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Elena Fernandez Rosa Fuentes Augusto Belendez Inmaculada Pascual |
spellingShingle |
Elena Fernandez Rosa Fuentes Augusto Belendez Inmaculada Pascual Influence of 4,4’-azobis (4-cyanopentanoic acid) in Transmission and Reflection Gratings Stored in a PVA/AA Photopolymer Materials holography photopolymers holographic recording materials |
author_facet |
Elena Fernandez Rosa Fuentes Augusto Belendez Inmaculada Pascual |
author_sort |
Elena Fernandez |
title |
Influence of 4,4’-azobis (4-cyanopentanoic acid) in Transmission and Reflection Gratings Stored in a PVA/AA Photopolymer |
title_short |
Influence of 4,4’-azobis (4-cyanopentanoic acid) in Transmission and Reflection Gratings Stored in a PVA/AA Photopolymer |
title_full |
Influence of 4,4’-azobis (4-cyanopentanoic acid) in Transmission and Reflection Gratings Stored in a PVA/AA Photopolymer |
title_fullStr |
Influence of 4,4’-azobis (4-cyanopentanoic acid) in Transmission and Reflection Gratings Stored in a PVA/AA Photopolymer |
title_full_unstemmed |
Influence of 4,4’-azobis (4-cyanopentanoic acid) in Transmission and Reflection Gratings Stored in a PVA/AA Photopolymer |
title_sort |
influence of 4,4’-azobis (4-cyanopentanoic acid) in transmission and reflection gratings stored in a pva/aa photopolymer |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2016-03-01 |
description |
Holographic transmission gratings with a spatial frequency of 2658 lines/mm and reflection gratings with a spatial frequency of 4553 lines/mm were stored in a polyvinyl alcohol (PVA)/acrylamide (AA) based photopolymer. This material can reach diffraction efficiencies close to 100% for spatial frequencies about 1000 lines/mm. However, for higher spatial frequencies, the diffraction efficiency decreases considerably as the spatial frequency increases. To enhance the material response at high spatial frequencies, a chain transfer agent, the 4,4’-azobis (4-cyanopentanoic acid), ACPA, is added to the composition of the material. Different concentrations of ACPA are incorporated into the main composition of the photopolymer to find the concentration value that provides the highest diffraction efficiency. Moreover, the refractive index modulation and the optical thickness of the transmission and reflection gratings were obtained, evaluated and compared to procure more information about the influence of the ACPA on them. |
topic |
holography photopolymers holographic recording materials |
url |
http://www.mdpi.com/1996-1944/9/3/194 |
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