Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/28416
Title: | Process optimization for the manufacturing of holographic elements using Darol photopolymer | Authors: | ZANUTTA, Alessio Resio, Federico Bertarelli, Chiara BIANCO, ANDREA |
Issue Date: | 2017 | Journal: | OPTICAL MATERIALS | Number: | 73 | First Page: | 497 | Abstract: | Design and manufacturing of high efficiency and reliable volume phase holographic optical elements require photosensitive materials where the performances of the device are straightforwardly related to the recording and post process parameters. In this context, Darol® photopolymers are promising materials since the modulation of the refractive index is set during the thermal process that follows the holographic exposure. In the present study, dry Darol® films are thermally processed to determine the optimized conditions to achieve a large modulation of the refractive index together with good optical properties of the hologram (i.e. transparency), flatness and homogeneity. For each condition, volume phase gratings are written and characterized in terms of diffraction efficiency. A threshold temperature of 150 °C is found, and only latent holograms are obtained at lower temperature, as confirmed by thermal characterizations. Moreover, a dependence of the refractive index modulation on the line density and laser intensity is highlighted. | URI: | http://hdl.handle.net/20.500.12386/28416 | URL: | https://www.sciencedirect.com/science/article/abs/pii/S0925346717305608?via%3Dihub | ISSN: | 0925-3467 | DOI: | 10.1016/j.optmat.2017.08.050 | Bibcode ADS: | 2017OptMa..73..497Z | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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Articolo_DAROL_final.pdf | preprint | 786.28 kB | Adobe PDF | View/Open |
Opt. mat. 1-s2.0-S0925346717305608-main.pdf | [Administrators only] | 1 MB | Adobe PDF |
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