Scattering delay times and transition rates for continuum resonance Raman scattering : detailed derivations via the time-dependent approach and applications to 79Br2
Scattering delay times and transition rates for continuum resonance Raman scattering : detailed derivations via the time-dependent approach and applications to 79Br2
复制标题
连续共振拉曼散射的散射延迟时间和跃迁速率：通过时间相关方法的详细推导以及 79Br2 的应用
DOI：
10.1063/1.462688
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发表时间：
1992
影响因子：
4.4
通讯作者：
J. Strempel
中科院分区：
文献类型：
--
作者：
B. Hartke;W. Kiefer;E. Kolba;J. Manz;J. Strempel
光子吸收和发射之间的散射延迟时间，以及连续共振拉曼散射的跃迁速率以连贯和详细的方式导出，在海勒，伊姆雷和其他人开创的时间依赖性方法中。由此产生的表达式的拉曼散射延迟时间相关的粒子散射延迟时间由Eisenbud，维格纳，史密斯在S矩阵的条款类似的表达式。这些表达式是有效的尖锐的光子频率的理想情况下，和有限的频率分布或激光轮廓的现实情况下。这种类型的共振散射的拉曼跃迁速率具有黄金法则类型的表达式，这意味着熟悉的选择规则和双光子跃迁的对称性，类似于单光子跃迁的费米-泡利黄金法则。应用到79 Br 2产生10 fs域中的超短拉曼散射延迟时间。
Scattering delay times between photon absorption and emission, and transition rates for continuum resonance Raman scattering are derived in a coherent and detailed fashion, within the time‐dependent approach pioneered by Heller, Imre, and others. The resulting expressions for the Raman scattering delay times are related to similar expressions for particle scattering delay times derived by Eisenbud, Wigner, and Smith in terms of S matrices. These expressions are valid both for the ideal cases of sharp photon frequencies, and for realistic cases of finite frequency distributions or laser profiles. The Raman transition rates for this type of resonance scattering have a golden‐rule‐type expression implying the familiar selection rules and symmetry of two‐photon transitions, similar to the Fermi–Pauli golden rule for single photon transitions. Applications to 79Br2 yield ultrashort Raman scattering delay times in the 10 fs domain.