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Open AccessArticle

LED-Cured Reflection Gratings Stored in an Acrylate-Based Photopolymer

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Departamento de Óptica, Farmacología y Anatomía, Universidad de Alicante, Apartado de correos 99, Alicante E-03080, Spain
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I.U. Física Aplicada a las Ciencias y las Tecnologías Universidad de Alicante, Apartado de correos 99, Alicante E-03080, Spain
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Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal, Universidad de Alicante, Apartado de correos 99, Alicante E-03080, Spain
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(4), 632; https://doi.org/10.3390/polym11040632
Received: 16 March 2019 / Revised: 28 March 2019 / Accepted: 4 April 2019 / Published: 6 April 2019
The storage of volume holographic reflection gratings in low-toxicity photopolymers represents a challenge at present since they can be used in many important applications such as biosensors and holographic optical elements. In this context, an acrylate-based photopolymer developed in our research group was employed to study the recording of unslanted holographic reflection gratings at high spatial frequencies. The optimal preparation conditions of the photopolymer layers were determinated. The diffraction efficiencies are measured in both recording and curing stage and a comparative study of these values was realized. In addition, a theoretical study using Kogelnik’s coupled wave theory was carried out with the aim of understanding the diffraction efficiency behaviour of both processes. In this work, a maximum diffraction efficiency of 14.1% was reached after a curing process in 150 µm layers at a recording wavelength of 488 nm. This value represents a good result compared to that reported in the literature and opens the way to reflection mode holography research using low-toxicity material. View Full-Text
Keywords: holographic reflection gratings; low-toxicity photopolymer; volume holography; LED-curing holographic reflection gratings; low-toxicity photopolymer; volume holography; LED-curing
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MDPI and ACS Style

Ramírez, M.G.; Sirvent, D.; Morales-Vidal, M.; Ortuño, M.; Martínez-Guardiola, F.J.; Francés, J.; Pascual, I. LED-Cured Reflection Gratings Stored in an Acrylate-Based Photopolymer. Polymers 2019, 11, 632.

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