Stimulated Raman Scattering Amplification under Ultrasound

IF 1.3 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

JETP Letters Pub Date : 2025-06-10 DOI:10.1134/S0021364025606736

M. A. Karpov, A. D. Kudryavtseva, T. V. Mironova, A. B. Nadykto, M. A. Shevchenko, N. V. Tcherniega, S. F. Umanskaya

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Abstract

We observe that ultrasound applied to water surprisingly results in a substantial enhancement of the stimulated Raman scattering (SRS) intensity in both forward and backward directions, and returns to the initial level after the ultrasound is stopped. Quantitatively, the first Stokes component of SRS increases by approximately 4 and 2.5–3 times in the forward and backward directions, respectively, while the second Stokes component exhibits a 5–6-fold increase. This striking SRS enhancement is accompanied by a simultaneous decrease in the elastic scattering intensity, which suggests an energy redistribution between scattering mechanisms. The effect is observed only at picosecond laser pumping (30 ps, 10 mJ, 10 Hz): no increase is observed when nanosecond laser pulses are used. This points out to randomly distributed feedback as an underlying physical mechanism. The SRS intensity enhancement was also observed in ethanol and acetone. The mechanism certainly requires further careful and detailed study.

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超声下受激拉曼散射放大

研究发现，超声作用于水后，水的受激拉曼散射（SRS）强度在正向和反向上均显著增强，并在超声停止后恢复到初始水平。在定量上，SRS的第一Stokes分量在正向和反向上分别增加了约4倍和2.5-3倍，第二Stokes分量则增加了5 - 6倍。这种显著的SRS增强伴随着弹性散射强度的同时降低，这表明在散射机制之间存在能量再分配。该效应仅在皮秒激光泵浦（30 ps, 10 mJ, 10 Hz）时观察到：当使用纳秒激光脉冲时没有观察到增加。这表明随机分布的反馈是一种潜在的物理机制。在乙醇和丙酮中也观察到SRS强度增强。这一机制当然需要进一步仔细和详细的研究。

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来源期刊

JETP Letters 物理-物理：综合

CiteScore

2.40

自引率

30.80%

发文量

164

审稿时长

3-6 weeks

期刊介绍： All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.