【摘要】 研究了一种新型双共轭链有机染料分子的双光子吸收 (TPA)及其光功率限幅特性 ,实验研究了该有机染料的双光子吸收谱和光功率限幅曲线 .结果证实在浓度为 1× 10 - 2 mol L的四氢呋喃 (THF)溶液中 ,该有机染料在近红外区有宽达 4 0 0nm的宽带非线性双光子吸收及光功率限幅特性 .它的双光子吸收谱存在三个峰 ,分别位于 730 ,85 0和 980nm ,并且在 85 0nm处有最大的TPA截面 ,为σ′2 =2 5 9× 10 - 47cm4 ·s·photon- 1 ,这比一般有机分子的TPA截面要大 1— 2个数量级 .更多还原

【Abstract】 The two-photon absorption (TPA) property and optical power limiting behaviour of a novel double-conjugated segment organic molecule have been investigated, and its TPA spectrum and optical power limiting curve have been experimentally obtained. Strong TPA and broadband optical power limiting properties from 700 nm to 1100 nm in the near infrared region have been demonstrated in the tetrahydrofuran (THF) solution with 1×10 -2mol/L concentration. It has three peaks of TPA cross section at 730,850 and 980 nm. The maximum TPA cross section is σ′ 2=25 9×10 -47cm4·s·photon -1 at 850*!nm, which is about 1-2 orders of magnitude larger than usual organic molecules.更多还原