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Excited state refraction of C70/toluene studied by using 4f coherent imaging system with phase object |
| Liu Nan-Chun(刘南春)a),Shi Guang(石光)b), Yang Jun-Yi(杨俊义)a),and Song Ying-Lin(宋瑛林) a)b)† |
| a School of Physical Science and Technology, Suzhou University, Suzhou 215006, China; b Department of Physics, Harbin Institute of Technology, Harbin 150001, China |
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Abstract Dynamic nonlinearities of C70/toluene solution are measured and analysed by an improved picosecond time-resolved pump-probe system based on a nonlinear imaging technique with phase object. The photophysical parameters are determined by the five-level model, which is adopted to interpret the experimental data. The change of refraction index per unit density of the excited state obtained by a numerically simulation is a critical factor to determine the nonlinear behaviour of C70 in picosecond time regime.
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Received: 31 January 2010
Revised: 26 March 2010
Accepted manuscript online:
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PACS:
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31.70.Hg
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42.70.Mp
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(Nonlinear optical crystals)
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42.65.-k
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(Nonlinear optics)
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| Fund: Project supported by the National Natural Science Fundation of China (Grant No. 90922007). |
Cite this article:
Liu Nan-Chun(刘南春), Shi Guang(石光), Yang Jun-Yi(杨俊义), and Song Ying-Lin(宋瑛林) Excited state refraction of C70/toluene studied by using 4f coherent imaging system with phase object 2011 Chin. Phys. B 20 013103
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