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arXiv 0907.3625physics.optics
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时频界面上的四波混频光谱

Four Wave Mixing Spectroscopy at the Interface Between the Time and Frequency Domains

Yuri Paskover, Andrey Shalit, Yehiam Prior

摘要:

组合的光谱和时间分辨测量提供了如果单独在任一域中执行则不可用的信息。我们展示了一种新的方法,四波混频光谱,光谱选择性是通过相位匹配滤波,而无需光谱仪,时间分辨信号是在一个单一的脉冲内获得,而无需机械扫描任何延迟。我们分析了简并四波混频信号,并表明,一个反向旋转的费曼图以前没有考虑是必要的,以了解测量的频率和时间分辨谱图。

英文摘要:

Combined spectrally and time resolved measurements provide information not otherwise available if performed in either domain alone. We demonstrate a new approach to Four Wave Mixing spectroscopy, where spectral selectivity is achieved by phase matching filtering without a spectrometer, and the time resolved signal is obtained within a single pulse and without mechanically scanning any delays. We analyze the Degenerate Four Wave Mixing signal, and show that a counter-rotating Feynman diagram not previously considered is necessary in order to understand the measured frequency and time resolved spectrograms.

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