Femtosecond interferometric photoacoustic spectroscopy using incoherent light
Femtosecond interferometric photoacoustic spectroscopy using incoherent light
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DOI：
10.1016/0009-2614(96)00675-6
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发表时间：
1996-08-16
影响因子：
2.8
通讯作者：
vanderZande, WJ
中科院分区：
文献类型：
--
作者：
Snoek, LC;Clement, SG;vanderZande, WJ
利用30 ps（半峰全宽）非相干光脉冲，将干涉相位调制飞秒波包技术与光声探测相结合，研究了转振波包。由于光脉冲的调制频率与光声池的谐振频率相对应的适应性，相位调制技术特别适合与光声检测相结合。作为一个例子来证明的原则，B-状态的碘已被选定。已经观察到振动能级12-15的平均330 fs波包周期和波包失相，与如果使用变换限制的100 fs fwhm脉冲所预期的那些相同。它示出，这些检测技术的组合结果成一个非常敏感的方法进行时间分辨实验。
An interferometric phase-modulated femtosecond wave packet technique has been combined with photoacoustic detection to study rovibrational wave packets, using 30 ps (full-width-at-half-maximum) incoherent light pulses. The phase-modulated technique is particularly suited to be combined with photoacoustic detection, thanks to the adaptability of the modulation frequency of the light pulses to correspond to a resonance frequency of the photoacoustic cell. As an example to demonstrate the principle, the B-state of iodine has been chosen. The average 330 fs wavepacket period of the vibrational levels 12-15 and wave packet dephasing have been observed, identical to those which would be expected if transform-limited, 100 fs fwhm pulses had been used. It is shown that the combination of these detection techniques results into a very sensitive method for performing time-resolved experiments.