中国物理B ›› 2010, Vol. 19 ›› Issue (6): 64213-064213.doi: 10.1088/1674-1056/19/6/064213
门志伟1, 曲冠男1, 杨光1, 里佐威1, 高淑琴1, 陆国会1, 孙成林2, 房文汇3
Fang Wen-Hui(房文汇)a)b), Men Zhi-Wei(门志伟) b), Sun Cheng-Lin(孙成林)a)† Qu Guan-Nan(曲冠男)b), Yang Guang(杨光)b), Li Zuo-Wei(里佐威)a)b),Gao Shu-Qin(高淑琴) b), and Lu Guo-Hui(陆国会)b)
摘要: This paper demonstrates the second-order nonlinear hyperpolarisability \gamma of all-trans-β-carotene in different solvents by linear spectroscopic technique that is based on resonance Raman scattering and UV--VIS (Ultraviolet-visible) absorption spectroscopy. Owing to the two-level model well describing the link that exists between the resonance Raman scattering and stimulated Raman scattering, the stimulated Raman polarisability α_{\rm R} can be calculated through the two-photon resonance system. The value of \gamma of all-trans-β-carotene in carbon bisulfide solution is 6.435\times 10^{-33} esu (1~esu of resistance =8.98755\times10^{11}~\Omega) that is close to the true value, because the solution of all-trans-β-carotene in carbon bisulfide satisfies the rigid resonance Raman scattering condition. This method is expected to be worthy of applications to measure the second-order nonlinear hyperpolarisability of a conjugate organic molecule.
中图分类号: