Fyzikální ústav Akademie věd ČR

Seminar Tuesday, 25/09/2012 10:00 - 11:00

Speakers: Dr. István Jánossy (Research Institute for Solid State Physics and Optics, Hungarian Academy of Science)
Place: Seminar room no. 117, Institute of Physics AS CR Na slovance
Presented in English
Organisers: Department of Dielectrics; Department of Chemistry

The nonlinear transmission properties of liquid crystalline cells doped with azo dyes is discussed. It is shown that from the transmission data the characteristic quantities of the isomerization process can be deducted and in addition the order parameter of both the trans and the cis conformer in the liquid crystal can be determined. Next we discuss the surface relief formation in azo dye-functionalized side-chain polymers. A new model for the mechanism of light-induced mass-flow in polymers is proposed.