Z-TYPE FILMS FOR SECOND HARMONIC GENERATION

摘要

Z-TYPE FILMS FOR SECOND HARMONIC GENERATION Optically non-linear materials suitable upon repeatedLangmuir-Blodgett dipping for forming Z-type (head-to-tail) filmsfor second harmonic generation include hemicyanine dyes which arevery unsymmetrical, i.e. which have hydrophobic substituentsdiffering in size by at least 4 carbon atoms, each end of ahydrophilic chromophore. A suitable dye is E-N-octadecyl-4-[2-(4-dibutylaminophenyl)ethenyl]quinolinium iodide.