CAJ | 학술논문

制备了一个新型可溶的含非线性生色团的聚炔共聚物,在8ns脉宽532nm下研究了不同浓度溶液的光限幅性能.采用Z-扫描技术测试了聚合物的激发态吸收,基于非线性理论对光限幅机理进行了讨论.结果表明聚合物的激发态吸收截面大于其基态吸收截面,其光限幅性能主要来源于分子的反饱和吸收(RSA).
제비료일개신형가용적함비선성생색단적취결공취물,재8ns맥관532nm하연구료불동농도용액적광한폭성능.채용Z-소묘기술측시료취합물적격발태흡수,기우비선성이론대광한폭궤리진행료토론.결과표명취합물적격발태흡수절면대우기기태흡수절면,기광한폭성능주요래원우분자적반포화흡수(RSA).
A novel soluble conjugated phenylacetylene copolymer containing nonlinear chromophore, poly {[4-ethynyl-4 '-(N, Ndiethylamino)azobenzene]-co-phenylacetylen} was prepared and its optical limiting (OL) properties were investigated in three different concentration solution with 8ns pluses at 532nm wavelength. The excited state absorption cross-section σex of this polymer was measured with the Z-scan technique. The optical limiting mechanism was discussed based on nonlinear absorption theory. The results show that this polymer possesses the larger excited state absorption cross-section than the ground state, indicating that the OL performance of this polymer mainly arises from the reverse saturable absorption (RSA).