Resonance and Relaxation in Light Scattering
Resonance and Relaxation in Light Scattering
复制标题
光散射中的共振和弛豫
DOI：
10.1143/jpsj.41.400
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发表时间：
1976
影响因子：
1.7
通讯作者：
Y. Toyozawa
中科院分区：
文献类型：
--
作者：
Y. Toyozawa
对原子共振荧光的阻尼理论进行了密度矩阵变换，对一般体系的共振拉曼散射进行了含时描述。在现实情况下，中间态的辐射阻尼可以用“阻尼算子”来描述。在大的遍历系统中，如果激发态内的弛豫时间比辐射寿命短得多，则散射减少为发光。在一个典型的情况下，时间分辨的发射光谱包括不同的阶段（i）散射复杂的吸收和发射是不可分割的，（ii）动力学，然后（iii）动力学弛豫引起的热发光，最终收敛到（iv）普通发光从放松的激发态。热发光不会出现在运动变窄的线内。光谱的解释也取决于观察方法。
Time dependent description of resonance Raman scattering is performed for a general system, by a density matrix reformulation of damping theory originally used for resonance fluorescence of atom. Radiative damping in the intermediate states can be described in terms of “damping operator” in realistic situations. In large ergodic systems, the scattering reduces to luminescence if the relaxation time within the excited states is much shorter than the radiative lifetime. In a typical case, time resolved emission spectra consist of various stages (i) scattering complex where absorption and emission are inseparable, (ii) dynamical and then (iii) kinetic relaxations giving rise to the hot luminescence, which finally converges to (iv) the ordinary luminescence from relaxed excited states. Hot luminescence does not appear within a motionally narrowed line. The interpretation of spectra depends also on the method of observation.