Abstract
We report on a novel ferroelectric liquid-crystal material with an exceptionally large and stable nonlinear optical response. The material shows a phase transition from theSmC* mesophase to the glassy state near room temperature. This allowed us to state-freeze a stable nonlinear optically active configuration close to room temperature at 10° C for one day. The stored orientations can easily be forced to relax back by heating slightly above the glass-transition temperature. The material and the freezing process have been characterized in detail by analyzing the frequency-doubling process of the fundamental radiation of a Nd: YAG laser in the liquid crystal. Under favourable conditions, we obtained second-order susceptibilities as large as χzzz = 0.5 pm/V.
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Loddoch, M., Marowsky, G., Schmid, H. et al. Novel glass-forming ferroelectric liquid-crystal material of high second-order nonlinearity. Appl. Phys. B 59, 591–595 (1994). https://doi.org/10.1007/BF01081178
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DOI: https://doi.org/10.1007/BF01081178