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

Author:

Ramírez Manuel,Sirvent Daniel,Morales-Vidal MartaORCID,Ortuño ManuelORCID,Martínez-Guardiola FranciscoORCID,Francés JorgeORCID,Pascual InmaculadaORCID

Abstract

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.

Funder

Generalitat Valenciana

Universidad de Alicante

Publisher

MDPI AG

Subject

Polymers and Plastics,General Chemistry

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