Simultaneous evaluation of the linear and quadratic electro-optic coefficients of the nonlinear optical polymer by attenuated-total-reflection technique

摘要

A method of simultaneously evaluating the linear electro-optic and quadratic electro-optic coefficients of the nonlinear polymer poly (9,9-dioctyl-2,7-fluorene-co-benzo[c][l,2,5]thiadiazole-co-9-hexyl-3, 6-carbazole) (PF8-BT-CZ) was proposed based on the attenuated-total-reflection (ATR) technique. The measurement was sensitively carried out without the lock-in amplifier due to the prism-waveguide configuration of the sample and only one single optical path was applied, which simplified the experimental setup.