Article

Polymer Science Series A

, 53:655

First online:

Orientational optical nonlinearity of nematic liquid crystals induced by high-molecular-mass azo-containing compounds

  • I. A. BudagovskyAffiliated withLebedev Physical Institute, Russian Academy of Sciences
  • , A. S. Zolot’koAffiliated withLebedev Physical Institute, Russian Academy of Sciences Email author 
  • , V. N. OchkinAffiliated withLebedev Physical Institute, Russian Academy of Sciences
  • , M. P. SmayevAffiliated withLebedev Physical Institute, Russian Academy of Sciences
  • , S. A. ShvetsovAffiliated withLebedev Physical Institute, Russian Academy of Sciences
  • , A. Yu. BobrovskyAffiliated withFaculty of Chemistry, Moscow State University
  • , N. I. BoikoAffiliated withFaculty of Chemistry, Moscow State University
  • , V. P. ShibaevAffiliated withFaculty of Chemistry, Moscow State University
  • , M. I. BarnikAffiliated withShubnikov Institute of Crystallography, Russian Academy of Sciences

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Abstract

Processes of light-induced reorientation of nematic liquid-crystalline molecules induced by the addition of low concentrations (0.1–2.0 wt %) of comb-shaped polymers and carbosilane dendrimers containing azobenzene fragments are studied. When the molecular structure of the above compounds becomes more complicated, the induced orientational nonlinearity increases. The introduction of 2G and 3G dendrimers into a nematic has for the first time made it possible to visualize and study a purely optical first-order Freedericksz transition in the field of a linearly polarized wave.