E. Vankeuren et al., 3RD-ORDER NONLINEAR-OPTICAL PROPERTIES OF NOVEL POLYTHIOPHENE DERIVATIVES, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 294, 1997, pp. 287-290
The third order nonlinear optical properties of polythiophene derivati
ves produced by a novel application of Stille coupling were investigat
ed by degenerate four wave mixing (DFWM) and third harmonic generation
(THG). By systematic changes in the substituted side groups, values o
f the third order susceptibility, chi((3)), reached 1.8x10(-9) esu (by
DFWM) with a figure of merit chi((3))/alpha similar to 7x10(-4) esu.c
m.