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Molecules 2019, 24(6), 1018; https://doi.org/10.3390/molecules24061018

Spatial Frequency Response of Epoxy-Based Volume Holographic Recording Material

Department of Chemistry, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
Received: 8 February 2019 / Revised: 5 March 2019 / Accepted: 11 March 2019 / Published: 14 March 2019
(This article belongs to the Special Issue Stimuli-Responsive Polymeric Materials)
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Abstract

Holographic volume phase gratings are recorded in an epoxy-based, free-surface, volume holographic recording material. Light-induced gratings are formed by photo-triggered mass migration caused by component diffusion. The material resolution enables a wide range of pattern spacings, to record both transmission and reflection holograms with many different spatial frequencies. An optimum spatial frequency response is found between the low spatial frequency roll-off and the high spatial frequency cut-off. The influence of the energy density of exposure on the spatial frequency response is investigated. Secondary volume holographic gratings (parasitic gratings) are observed in the high frequency range. The possibility of distinguishing the regular grating from the secondary grating is discussed in the form of probe wavelength detuning. View Full-Text
Keywords: photosensitive materials; volume holographic phase gratings; diffractive optical elements; material response; secondary gratings; transmission gratings; reflection gratings photosensitive materials; volume holographic phase gratings; diffractive optical elements; material response; secondary gratings; transmission gratings; reflection gratings
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Sabel, T. Spatial Frequency Response of Epoxy-Based Volume Holographic Recording Material. Molecules 2019, 24, 1018.

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