Alkali-Responsive Absorption Spectra and Third-Order Optical Nonlinearities of Imino Squaramides
LI Zhong-Yu1, 2, 3**,XU Song1,ZHOU Xin-Yu4,ZHANG Fu-Shi4
1School of Petrochemical Engineering, Changzhou University, Changzhou 213164 2 Changzhou Expansion New Stuff Technology Limited Company, Changzhou 213122 3Department of Material Science and Chemical Engineering, Jilin Institute of Chemical Technology, Jilin 132022 4 Department of Chemistry, Tsinghua University, Beijing 100084
Alkali-Responsive Absorption Spectra and Third-Order Optical Nonlinearities of Imino Squaramides
LI Zhong-Yu1, 2, 3**,XU Song1,ZHOU Xin-Yu4,ZHANG Fu-Shi4
1School of Petrochemical Engineering, Changzhou University, Changzhou 213164 2 Changzhou Expansion New Stuff Technology Limited Company, Changzhou 213122 3Department of Material Science and Chemical Engineering, Jilin Institute of Chemical Technology, Jilin 132022 4 Department of Chemistry, Tsinghua University, Beijing 100084
摘要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 800 nm. 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.
Abstract：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 800 nm. 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.
2012, Vol. 29 
