Light-induced second-harmonic generation in azo-dye polymers.
The permanent all-optical poling of an azo-aromatic acrylic copolymer is experimentally demonstrated by seeding preparation in a backward phase-conjugation geometry. The microscopic mechanism involves an orientational hole burning followed by orientational redistribution caused by trans-to-cis isomerization of the azo-dye chromophores. The characteristic kinetics of monitored by second-harmonic generation.
Charra
F
F
Kajzar
F
F
Nunzi
J M
JM
Raimond
P
P
Idiart
E
E