Off-resonant preparation of a vibrational coherence for enhanced stimulated Raman scattering
Off-resonant preparation of a vibrational coherence for enhanced stimulated Raman scattering
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用于增强受激拉曼散射的振动相干性的非共振制备
DOI：
10.1103/physreva.72.033824
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发表时间：
2005
影响因子：
2.9
通讯作者：
J. Marangos
中科院分区：
文献类型：
--
作者：
S. Gundry;M. Anscombe;A. M. Abdulla;S. Hogan;E. Sali;J. Tisch;J. Marangos
我们提出了一个详细的实验研究的非共振制备的振动相干多级拉曼产生。特别是，之间的平衡的重要性，产生一个强的连贯性和绝热演化的系统的冲突的要求进行检查。对于在我们的实验中可访问的参数，我们发现，最强的频率调制发生在有一些非绝热行为的条件下，并且相干性小于可获得的峰值。我们调查的窄带探测脉冲的调制，和超短探测脉冲，在相干制备的介质中，并证明两个探测脉冲的有效调制导致产生的360\phantom {\rule{0. 3em}{0 ex}}\mathrm{THz}$带宽字段。因此，该系统在亚飞秒脉冲产生领域具有应用。
We present a detailed experimental investigation into the off-resonant preparation of a vibrational coherence for multiorder Raman generation. In particular, the importance of the balance between the conflicting requirements for generating a strong coherence and for adiabatic evolution of the system are examined. For the parameters accessible in our experiment, we find that the strongest frequency modulation occurs under conditions for which there is some nonadiabatic behavior, and the coherence is less than the peak value obtainable. We investigate the modulation of a narrowband probe pulse, and an ultrashort probe pulse, in the coherently prepared medium, and demonstrate efficient modulation of both probe pulses resulting in the generation of $360\phantom{\rule{0.3em}{0ex}}\mathrm{THz}$ bandwidth fields. This system therefore has an application in the field of subfemtosecond pulse generation.