Light Induced Structural Transition in $B_7$ phase of Bent-shaped Liquid Crystals containing Azo dye

  • Kim, Hee-Kyung (Department of Physics, Korea University) ;
  • Shin, S.T. (Department of Applied Physics, Korea University) ;
  • Lee, C.K. (Department of Chemistry, Gyeongsang National University) ;
  • Jang, Chi-Woong (Department of Physics, Korea University) ;
  • Lim, Tong-Kun (Department of Physics, Korea University)
  • Published : 2002.08.21


The influence of isomeric state of doped azo dye on the $B_7$ phase of bent-shaped liquid crystal (LC) is studied. It was found that modulating the isomeric trans-cis state of azo dye can change the molecular arrangement of the bent-shaped LCs. To identify these phenomena the observations of microscopic texture, electro-optic response, second harmonic wave generation (SHG) and switching current were carried out..