| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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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 |
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| Cite this article: |
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LI Zhong-Yu, **, XU Song et al 2012 Chin. Phys. Lett. 29 054206 |
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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.
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| Keywords:
42.65.An
42.70.-a
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Received: 21 November 2011
Published: 30 April 2012
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| PACS: |
42.65.An
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(Optical susceptibility, hyperpolarizability)
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42.70.-a
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(Optical materials)
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