在532 nm波长处测量了共轭高聚物PPQ薄膜的三阶光学非线性参数, 发现其较强的非线性(双光子)吸收系数β≈0.59 cm/MW。 其非线性折射率系数n2≈9.5×10-10 esu, 认为这是双光子激发的纯电子响应。 并对材料的品质因素进行了评估。

Measurements on the third order optical nonlinearities of the conjugated polymeric cast film of PPQ (polyphenylquinoxalines) were performed at 532 nm wavelength using a frequency doubled mode-locked Nd:YAG laser with 10 Hz repetition rate. Strong two-photon absorption coefficient β=0.59 cm/MW was obtained for PPQ. The measured nonlinear refractive index coefficient n2≈9.5×10-10 esu, was in agreement with the previously reported value. It was attributed to a purely electronic response for the optical nonlinearity, and the figure of merit of PPQ was assessed.