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第十五届全国化学动力学会议

作者：梁先庭 Department of Physics Ningbo University

In this paper, we propose a method for theoretically simulating the response functions and then the 2D, third-order, non-linear, photon response spectra obtained from photon echo experiments of some complex molecular system. Here, we supposed that the exciton modes of the molecular system are coupled to their environments which are described with damped harmonic oscillators, and the Hamiltonian of the system-bath can be expressed into the normally ordered form. Two kinds of models of open molecules, the single-site molecule, and the coupled two-site molecule are investigated. It is shown that their 2D, third-order, non-linear, photon echo spectra calculated with this method are similar to the ones obtained from other methods. If only the normally ordered form of system-bath Hamiltonian can be obtained, this analytical method can also be used in other complex models.

关键词： photon echo Normally order form 2D spectroscopy

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Characteristics of spectral-hole burning in Tm^(3+):YAG based on the perturbation theory

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Chinese Physics B 2014年第6期23卷 37-43页

作者：张世宇马秀荣张双根陈雷王夏洋穆宽林王松 Engineering Research Center on Communication Devices (Ministry of Education) School of Computer and Communication EngineeringTianjin University of Technology Tianjin Key Laboratory of Film Electronic and Communication Device School of Electronic Information EngineeringTianjin University of Technology

In this paper, the physical mechanism of the interaction between electromagnetic wave and spectral-hole burning crystal material is investigated in detail. In the small signal regime, a perturbation theory model is used to analyze the mechanism of spectral-hole burning. By solving the Liouville equation, three-order perturbation results are obtained. From the theoretic analysis, spectral-hole burning can be interpreted as a photon echo of the zero-order diffraction echo when the first optical pulse and the second optical pulse are overlapped in time. According to the model, the spectral-hole width is dependent on the chirp rate of the reading laser. When the chirp rate is slow with respect to the spectral features of interest, the spectral hole is closely mapped into time domain. For a fast chirp rate, distortions are observed. The results follow Maxwell-Bloch model and they are also in good agreement with the experimental results.

关键词： perturbation theory spectral-hole burning photon echo

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Studies on optical dephasing of amorphous semiconductor with incoherent light

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Chinese Journal of Lasers 1993年第5期 73-79页

作者： D. J. Zhou, G. Qiu, C. H. Fu, Q. X. Li(Institute for Laser & Spectroscopy, Zhongshan University, Guangzhou 510275, China)

Dephasing in a-Si0.65C0.35: H is observed by time-delayed four-wave mixing incoherent light. Results are in correspondance with consequences of disorder and localization on nonlinear optical response of the solid.

关键词： time-delayed four-wave mixing incoherent light photon echo amorphous semiconductor

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