Orientational photorefractive holograms in porphyrin:Zn-doped nematic liquid crystals.
We investigated the diffraction properties of dynamic holograms recorded in porphyrin:Zn doped nematic liquid crystals (NLCs) under the influence of an applied dc electric field for various conditions of the grating period, the writing beam intensity and the applied electric field. We also derived an analytic expression for diffraction efficiency from NLCs material equations and torque balance equations and compared the experimental results with the theory, revealing excellent agreement.
Kim
Eun Ju
EJ
Department of Physics, Yeungnam University, Kyongsan 712-749, Korea.
Yang
Hye Ri
HR
Lee
Sang Jo
SJ
Kim
Gun Yeup
GY
Kwak
Chong Hoon
CH