Third-order optical nonlinearities and dynamic responses of two imino squaramides under neutral and base conditions were studied using the femtosecond degenerate four-wave mixing technique at 800nm.Ultrafast optical r...Third-order optical nonlinearities and dynamic responses of two imino squaramides under neutral and base conditions were studied using the femtosecond degenerate four-wave mixing technique at 800nm.Ultrafast optical responses have been observed and the magnitude of the second-order hyperpolarizabilities of the squaramides has been measured to be as large as 10 31 esu. The absorption spectra,color of solution,and third-order optical nonlinearities of two imino squaramides change with the addition of sodium hydroxide.The γ value under the base condition for each dye is approximately 1.25 times larger than that under neutral conditions.展开更多
基金Supported by the National Natural Science General Foundation of China under Grant Nos 20572059 and 20502013the National Key Fundamental Research Program under Grant No 2007CB808000+1 种基金Research Foundation for Talented Scholars of Changzhou University under Grant No ZMF11020007the Natural Science Foundation of Changzhou City under Grant No CJ20115009.
文摘Third-order optical nonlinearities and dynamic responses of two imino squaramides under neutral and base conditions were studied using the femtosecond degenerate four-wave mixing technique at 800nm.Ultrafast optical responses have been observed and the magnitude of the second-order hyperpolarizabilities of the squaramides has been measured to be as large as 10 31 esu. The absorption spectra,color of solution,and third-order optical nonlinearities of two imino squaramides change with the addition of sodium hydroxide.The γ value under the base condition for each dye is approximately 1.25 times larger than that under neutral conditions.
