摘要
有对称的 D 的三新奇非线性的色基 -- D 分子的结构和扩大结合的长度被综合。Solvatochromism 分析显示出在在地面和激动的状态之间的偶极子时刻由改进发生在色基的大对称的 intramolecular 充电转移。限制由三光子的吸收(3PA ) 导致了的光力量的性质被表明。大 3PA coeficients 和象 1074 cm6 s2 一样高的相应的分子的生气的节从非线性的传播大小在 1.06 m 为毫微秒激光脉搏被获得。
Three novel nonlinear chromophores with symmetric D-π-D molecular structure and extended conjugated length were synthesized. Solvatochromism analysis shows great symmetric intramolecular charge transfer occurring in chromophores by the enhancement in the dipole moment between the ground and excited states. The properties of optical power limiting induced by three-photon absorption （3PA） are demonstrated. Large 3PA coefficients and the corresponding molecular cross sections as high as 10^-74 cm^6s^2 were obtained for nanosecond laser pulses at 1.06μm from nonlinear transmission measurements.
基金
This work was supported by the National Natural Science Foundation of China （No.90201016）.
关键词
非线性生色团
溶剂化显色
三光子吸收
光限幅
Nonlinear chromophores, Solvatochromism, Three-photon absorption, Optical limiting
