Strongly non-linear optical ferroelectric liquid crystals for frequency doubling |
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| Authors: | K Schmitt R-P Herr M Schadt J Fünfschilling R Buchecker X H Chen |
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| Institution: | 1. F. Hoffman-La Roche Inc., Dept. RLCR , 4002 , Basel , Switzerland;2. Technical University of Berlin , Inst. Organic Chemistry (3) 1000, Berlin , 12 , Germany |
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| Abstract: | Abstract From our research for novel non-linear optical (NLO) materials for frequency doublers and optical modulators we report on new ferroelectric liquid crystals, which for the first time, exhibit second order NLO coefficients (for example d 22 = 5 pm V?1, which are comparable to those of state of the art inorganic NLO materials. The novel compounds contain 5-amino-2-nitrophenyl groups attached close to the chiral centres. The switching behaviour of the new compounds, their spontaneous polarization, as well as their frequency doubling of Nd:YAG laser pulses in the S*c and in the glass state, are reported. Moreover their waveguiding properties are presented. |
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