Next Article in Journal
Comparison of Maraging Steel Micro- and Nanostructure Produced Conventionally and by Laser Additive Manufacturing
Previous Article in Journal
Concrete Cracking Prediction Including the Filling Proportion of Strand Corrosion Products
Article Menu
Issue 1 (January) cover image

Export Article

Open AccessArticle
Materials 2017, 10(1), 9; doi:10.3390/ma10010009

A Comprehensive Study of Photorefractive Properties in Poly(ethylene glycol) Dimethacrylate— Ionic Liquid Composites

1
Physics Department, Faculty of Science, Tanta University, Tanta 31527, Egypt
2
Physics Department, Faculty of Science, Taibah University, P.O. Box 30002, Al-Madina Al-Monaoura 42353, Saudi Arabia
3
Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, SI-1000 Ljubljana, Slovenia
4
Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Wien, Austria
*
Author to whom correspondence should be addressed.
Academic Editor: Dirk Poelman
Received: 28 October 2016 / Revised: 11 December 2016 / Accepted: 19 December 2016 / Published: 24 December 2016
(This article belongs to the Section Advanced Composites)
View Full-Text   |   Download PDF [5020 KB, uploaded 24 December 2016]   |  

Abstract

A detailed investigation of the recording, as well as the readout of transmission gratings in composites of poly(ethylene glycol) dimethacrylate (PEGDMA) and ionic liquids is presented. Gratings with a period of about 5.8 micrometers were recorded using a two-wave mixing technique with a coherent laser beam of a 355-nm wavelength. A series of samples with grating thicknesses d 0 = 10 150 micrometers, each for two different exposure times, was prepared. The recording kinetics, as well as the post-exposure properties of the gratings were monitored by diffracting a low intensity probe beam at a wavelength of 633 nm for Bragg incidence. To obtain a complete characterization, two-beam coupling experiments were conducted to clarify the type and the strength of the recorded gratings. Finally, the diffraction efficiency was measured as a function of the readout angle at different post-exposure times. We found that, depending on the parameters, different grating types (pure phase and/or mixed) are generated, and at elevated thicknesses, strong light-induced scattering develops. The measured angular dependence of the diffraction efficiency can be fitted using a five-wave coupling theory assuming an attenuation of the gratings along the thickness. For grating thicknesses larger than 85 microns, light-induced scattering becomes increasingly important. The latter is an obstacle for recording thicker holograms, as it destroys the recording interference pattern with increasing sample depth. The obtained results are valuable in particular when considering PEGDMA-ionic liquid composites in the synthesis of advanced polymer composites for applications, such as biomaterials, conductive polymers and holographic storage materials. View Full-Text
Keywords: holographic gratings; mixed phase and absorption gratings; photopolymer composites; poly(ethylene glycol)dimethacrylate; ionic liquids; diffraction theories holographic gratings; mixed phase and absorption gratings; photopolymer composites; poly(ethylene glycol)dimethacrylate; ionic liquids; diffraction theories
Figures

Figure 1

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).

Supplementary material

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Ellabban, M.A.; Glavan, G.; Klepp, J.; Fally, M. A Comprehensive Study of Photorefractive Properties in Poly(ethylene glycol) Dimethacrylate— Ionic Liquid Composites. Materials 2017, 10, 9.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top