NONLINEAR-OPTICAL PROPERTIES OF FERROELECTRIC LIQUID-CRYSTAL

Nonlinear optical phenomena such as second harmonic generation (SHG) h ave been studied in various ferroelectric liquid crystals. SHG efficie ncy depends on the molecular structure of ferroelectric liquid crystal and can be controlled by applied voltage. Phase matching of SHG has b een well realized in these ferroelectric liquid crystals. SHG in polym eric ferroelectric liquid crystals, ferroelectric liquid crystal-condu cting polymer composites, thin ferroelectric liquid crystal films and liquid crystals which exhibit flexoelectric effect have also been disc ussed.