From Event: SPIE Organic Photonics + Electronics, 2016
Liquid crystal cells with LiNbO3:Fe crystals as substrates, are described. The photovoltaic field generated by the substrates is able to reorient the liquid crystal director thus giving rise to a phase shift on the light propagating through the cell, as in liquid crystal light valves. The process does not require the application of an external electric field, thus being potentially useful for applications requiring a high degree of compactness. A detailed characterization of several cells based on lithium niobate crystals with different iron concentration has been carried out. The correlation between the LiNbO3:Fe characteristics and the liquid crystal reorientation is also discussed.
L. Lucchetti, K. Kushnir, F. Ciciulla, A. Zaltron, G. Bettella, G. Pozza, C. Sada, V. Reshetnyak, and F. Simoni, "All-optical phase shifter with photovoltaic liquid crystal cell," Proc. SPIE 9940, Liquid Crystals XX, 99400G (Presented at SPIE Organic Photonics + Electronics: August 28, 2016; Published: 23 September 2016); https://doi.org/10.1117/12.2235580.
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