Dynamical semigroup Fokker–Planck equation approach to transient absorption and fluorescence upconversion spectroscopies
Dynamical semigroup Fokker–Planck equation approach to transient absorption and fluorescence upconversion spectroscopies
复制标题
用于瞬态吸收和荧光上转换光谱的动态半群福克-普朗克方程方法
DOI：
10.1063/1.1344608
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发表时间：
2001
影响因子：
4.4
通讯作者：
Yijing Yan
中科院分区：
文献类型：
--
作者：
F. Shuang;Chen Yang;Yijing Yan
构造了一个同时满足任意温度下半经典详细平衡关系的动态半群Fokker-Planck方程，并将其进一步应用于凝聚态两面分子体系的非线性光谱过程。耗散包括核自由度和电子自由度的t1振动弛豫和纯t2消相。为了有效地评价脉冲激光光谱，提出了场修饰光响应函数的混合海森堡-薛定谔图。在一维耗散摩尔斯分子系统中进行了数值模拟。从潜在耗散动力学的角度对泵浦-探针吸收和时频分辨荧光光谱进行了详细的论证和分析。
A dynamical semigroup Fokker–Planck equation, which meanwhile satisfies also the semiclassical detailed-balance relation at arbitrary temperatures, is constructed and further applied to nonlinear spectroscopic processes of two-surface molecular systems in condensed phases. Included in dissipation are the T1-vibrational relaxation and the pure T2-dephasing in both nuclear and electronic degrees of freedom. A mixed Heisenberg–Schrodinger picture of the field-dressed optical response function is proposed to efficient evaluation of pulsed-laser spectroscopies. Numerical simulations are carried out in a model one-dimensional dissipative Morse molecular system. Both the pump–probe absorption and the time-frequency resolved fluorescence spectra are demonstrated and analyzed in detail in terms of the underlying dissipative dynamics.