4.6 Article

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

期刊

Applied Sciences-Basel
卷 4, 期 1, 页码 19-27

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MDPI AG
DOI: 10.3390/app4010019

关键词

volume holography; phase gratings; transmission gratings; reflection gratings; photosensitive polymers; holographic data storage; imaging techniques; resolution limit

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  1. co:bios foundation

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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 mu m 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.

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