RADIATION-MATTER OSCILLATIONS AND SPECTRAL-LINE NARROWING IN FIELD-CORRELATED 4-WAVE-MIXING .2. EXPERIMENT

被引:52
作者
DUGAN, MA
ALBRECHT, AC
机构
[1] Department of Chemistry, Cornell University, Ithaca
来源
PHYSICAL REVIEW A | 1991年 / 43卷 / 07期
关键词
D O I
10.1103/PhysRevA.43.3922
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
New radiation-matter phenomena in four-wave mixing spectroscopies, given a theoretical basis in the preceding paper [Dugan and Albrecht, Phys. Rev. A 43, 3877 (1991)], are examined experimentally here. A new class of Rabi detuning oscillations is recorded in interferometric coherent Stokes Raman scattering (CSRS). Two identical nanosecond incoherent light are mutually delayed, while simultaneously mixing in a nonlinear medium with a narrow-band field of a different color. Spectral filtering of the CSRS signal is essential. From such signals the frequencies and the dephasing rate constants can be a measure of the Raman-active vibrations in both the electronic ground state and the electronic excited state of the scattering chromophore. In principle, analogous probing of vibronic transitions is possible. Detuning oscillations for multimode systems are presented. It is shown how they are transformed into quantum beats, exactly those seen with femtosecond CSRS, when the narrow-band field is made broad and/or the detection is "white." Finally, an example of the sub-Raman linewidth spectral feature, predicted in the preceding paper, is presented. It determines a Raman frequency, but does not carry its linewidth.
引用
收藏
页码:3922 / 3933
页数:12
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