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Appl. Sci. 2014, 4(1), 19-27; doi:10.3390/app4010019
Article

Imaging of Volume Phase Gratings in a Photosensitive Polymer, Recorded in Transmission and Reflection Geometry

1,*  and 2
1 Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany 2 Pankstrasse 12, 13127 Berlin, Germany
* Author to whom correspondence should be addressed.
Received: 30 November 2013 / Revised: 15 January 2014 / Accepted: 24 January 2014 / Published: 20 February 2014
(This article belongs to the Special Issue Optical Memory)
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Abstract

Volume phase gratings, recorded in a photosensitive polymer by two-beam interference exposure, are studied by means of optical microscopy. Transmission gratings and reflection gratings, with periods in the order of 10 μm down to 130 nm, were investigated. Mapping of holograms by means of imaging in sectional view is introduced to study reflection-type gratings, evading the resolution limit of classical optical microscopy. In addition, this technique is applied to examine so-called parasitic gratings, arising from interference from the incident reference beam and the reflected signal beam. The appearance and possible avoidance of such unintentionally recorded secondary structures is discussed.
Keywords: volume holography; phase gratings; transmission gratings; reflection gratings; photosensitive polymers; holographic data storage; imaging techniques; resolution limit volume holography; phase gratings; transmission gratings; reflection gratings; photosensitive polymers; holographic data storage; imaging techniques; resolution limit
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.

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Sabel, T.; Zschocher, M. Imaging of Volume Phase Gratings in a Photosensitive Polymer, Recorded in Transmission and Reflection Geometry. Appl. Sci. 2014, 4, 19-27.

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