Electrically Controlled Second-Harmonic Generation in Ferroelectric Liquid Crystal

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Abstract
The angularly phase-matched second-harmonic generation (SHG) in ferroelectric liquid crystal has been studied as a function of electric field strength, sample thickness, rotating angle and temperature. A sharp angular phase-matching curve of the SHG controlled by an electric field is observed even in the liquid crystal. The temperature dependence of the phase-matched SHG in the ferroelectric phase has also been studied, and the temperature-tuned phase matching of SHG is realized by using the change in tilt angle of the ferroelectric liquid crystal.