Takeo Sasaki

Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/60776

### **Abstract**

In this chapter, the photorefractive effect in photoconductive ferroelectric liquid crystal blends is described. A blend of liquid crystals that form chiral smectic C phase and photoconductive compounds shows the photorefractive effect. The ferroelectric liquid crystal blends containing a photoconductive chiral compound were found to exhibit a gain coefficient of over 1200 cm-1 and the response time of sub-millisecond. Using the blend, real-time dynamic amplification of an optical image signal of over 30 fps was demonstrated.

**Keywords:** Ferroelectric liquid crystals, photorefractive effect, semiconductor, pho‐ toconductivity, hologram
