Optically addressed modulator for tunable spatial polarization control

We present an optically addressed non-pixelated spatial light modulator. The system is based on reversible photoalignment of a LC cell using a red light sensitive novel azobenzene photoalignment layer. It is an electrode-free device that manipulates the liquid crystal orientation and consequently th...

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Bibliographic Details
Published in:Optics express 2018-10, Vol.26 (21), p.28119-28130
Main Authors: Schaal, Frederik, Rutloh, Michael, Weidenfeld, Susanne, Stumpe, Joachim, Michler, Peter, Pruss, Christof, Osten, Wolfgang
Format: Article
Language:English
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Summary:We present an optically addressed non-pixelated spatial light modulator. The system is based on reversible photoalignment of a LC cell using a red light sensitive novel azobenzene photoalignment layer. It is an electrode-free device that manipulates the liquid crystal orientation and consequently the polarization via light without artifacts caused by electrodes. The capability to miniaturize the spatial light modulator allows the integration into a microscope objective. This includes a miniaturized 200 channel optical addressing system based on a VCSEL array and hybrid refractive-diffractive beam shapers. As an application example, the utilization as a microscope objective integrated analog phase contrast modulator is shown.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.26.028119