Theory of time and frequency resolved resonance secondary radiation from a three‐level system
Theory of time and frequency resolved resonance secondary radiation from a three‐level system
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三能级系统的时间和频率分辨共振二次辐射理论
DOI：
10.1063/1.450517
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发表时间：
1986
影响因子：
4.4
通讯作者：
A. C. Albrecht
中科院分区：
文献类型：
--
作者：
J. Melinger;A. C. Albrecht
利用微扰密度矩阵的形式，研究了光致自发辐射过程中随时间变化的共振拉曼散射（RRS）和共振热发光（RHL）分量，即共振二次辐射（RSR）。采用三能级系统随机耦合的方法，研究了随时间变化高斯宽度的相干激光脉冲驱动的RSR发射。光检测系统中的光谱滤波器明确地包含在问题的检测步骤中。然后对可观测的时间和频率分辨RSR谱进行数值计算。当脉冲宽度与重要的系统消相常数在同一数量级时，时间相关RSR谱的频谱和时间特性对驱动脉冲的宽度非常敏感。在这个区域，随着光脉冲的缩短，RRS对RSR光谱的贡献相对于RHL减弱。在激光脉冲变成“δ fu…
The perturbative density matrix formalism is used to study the time‐dependent resonance Raman scattering (RRS) and resonance hot luminescence (RHL) components of the light‐induced spontaneous emission process that has been called resonance secondary radiation (RSR). A three‐level system coupled in a stochastic way to a bath is used to study the RSR emission driven by a coherent laser pulse with a variable Gaussian width in time. The spectral filter in a light detection system is explicitly included in the detection step of the problem. Observable time and frequency resolved RSR spectra are then calculated numerically. The spectral and temporal properties of the time‐dependent RSR spectrum are very sensitive to the width of the driving pulse when the pulse width is of the same order of magnitude as the important system dephasing constants. In this domain the RRS contribution to the RSR spectrum weakens relative to the RHL as the light pulse is shortened. In the limit that the laser pulse becomes ‘‘delta fu...