Nonlinear optical property of azo-dye doped liquid crystals determined by biphotonic Z-scan technique.
This work investigates the optical Kerr property of azo-dye doped nematic liquid crystal films using the biphotonic Z-scan technique. The results indicate that the nonlinear effect measured using the Z-scan technique with a red light can be modulated or switched with the simultaneous application of a green light, because of photoisomerization and thermal effects, as determined by dynamic measurements. The former dominates in the early stage when the green light is applied, while the latter dominates in the later stage.
Fuh
Andy Ying-Guey
AY
Lin
Hui-Chi
HC
Mo
Ting-Shan
TS
Chen
Ching-Hsu
CH