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利用飞秒激光系统在 830nm波长处测量了一种含 5_对羟基苯基_10 ,15 ,2 0_三苯基卟啉 (HTPP)生色团聚合物HTPP_PGMA的三阶非线性光学特性 ,实验结果表明HTPP_PGMA具有较大的三阶非线性极化率 χ( 3) ≈ 2 8×10 - 1 1 esu。认为这是双光子激发的纯电子响应。
The third-order nonlinear optical properties of HTPP_PGMA with 5-p-hydroxyphenyl-10,15-diphenylporphyrin (HTPP) chromophore was measured at femtosecond wavelength using a femtosecond laser system. The experimental results show that HTPP_PGMA has a large third - order nonlinear polarizability χ (3) ≈ 2 8 × 10 - 1 1 esu. Think of it as a two-photon-excited purely electronic response.