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Asymmetric broadening and blue shift of the stimulated Raman scattering spectrum in water under chirped picosecond laser pulse train excitation
Laser Physics Letters ( IF 1.7 ) Pub Date : 2020-11-04 , DOI: 10.1088/1612-202x/abbf47
Sergey M Pershin 1 , Evgeny V Shashkov 1 , Nikolay S Vorobiev 1 , Sergey P Nikitin 2 , Mikhail Ya Grishin 1, 3 , Anton S Komel’Kov 1
Affiliation  

For the first time, we have revealed an asymmetric broadening and a 35 cm−1 blue shift (up to 3400 cm−1) of the stimulated Raman scattering OH band in water under chirped picosecond pulse train excitation (pulse duration ∼60 ps with 8 ns interval between pulses) while increasing the train length to 25 pulses. From the observed broadening and shift of the OH band centroid, a lower estimate (≥8 ns) of molecular complexes spectral states relaxation time at room temperature was obtained.



中文翻译:

chi皮秒激光脉冲序列激发下水中拉曼散射光谱的不对称加宽和蓝移

第一次,我们发现了chi声级的皮秒脉冲序列激发(脉冲持续时间约60 ps,8脉冲)下水中受激拉曼散射OH带的不对称展宽和蓝移35 cm -1(最大3400 cm -1)。脉冲之间的ns间隔),同时将序列长度增加到25个脉冲。从观察到的OH能带重心的展宽和移动,可以获得较低的分子复合物在室温下光谱态弛豫时间的估计值(≥8 ns)。

更新日期:2020-11-04
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