Anomalous Decrease in the Threshold of Stimulated Raman Scattering near the Surface of Liquid Nitrogen

被引：0
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作者：
S. M. Pershin
M. Ya. Grishin
V. N. Lednev
P. A. Chizhov
机构：
[1] Russian Academy of Sciences,Prokhorov General Physics Institute
[2] State University,Moscow Institute of Physics and Technology
来源：
JETP Letters | 2019年 / 109卷
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摘要：
An anomalously strong (up to 13 times) reduction of the threshold of the stimulated Raman scattering of 15-ps laser pulses in liquid nitrogen has been found when moving the caustic of a pump beam from the bulk through the free surface. A nonmonotonic N-shaped dependence of the stimulated Raman scattering threshold on the distance of the beam waist to the surface has been recorded for the first time with a minimum reached when the plane front of the beam caustic coincides with the surface. The physical mechanism of the detected phenomenon has been discussed.
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页码：437 / 440
页数：3
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