JETP Letters

, Volume 109, Issue 7, pp 437–440 | Cite as

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

  • S. M. PershinEmail author
  • M. Ya. Grishin
  • V. N. Lednev
  • P. A. Chizhov
Optics and Laser Physics


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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Copyright information

© Pleiades Publishing, Inc. 2019

Authors and Affiliations

  • S. M. Pershin
    • 1
    Email author
  • M. Ya. Grishin
    • 1
    • 2
  • V. N. Lednev
    • 1
  • P. A. Chizhov
    • 1
  1. 1.Prokhorov General Physics InstituteRussian Academy of SciencesMoscowRussia
  2. 2.Moscow Institute of Physics and TechnologyState UniversityDolgoprudnyi, Moscow regionRussia

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