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Stimulated Brillouin Gain Spectroscopy of Superfluid Helium-4
Journal of Low Temperature Physics ( IF 2 ) Pub Date : 2021-03-08 , DOI: 10.1007/s10909-021-02584-w
Lionel Djadaojee , Albane Douillet , Jules Grucker

We report stimulated Brillouin gain spectra of bulk superfluid helium-4. Stimulated Brillouin gain spectroscopy is a powerful optical method to probe the acoustic properties of liquid helium in a narrow spatio-temporal domain with moderate optical power and fast acquisition rates. We determine the velocity of first sound of superfluid helium-4 from the stimulated Brillouin gain spectra between 0.90 and 2.17 K and compare it to well-known available data, which validate our experimental method.



中文翻译:

超流氦4的刺激布里渊增益光谱

我们报告了整体超流体氦4的激发布里渊增益谱。受激布里渊增益光谱法是一种强大的光学方法,可以在中等时空功率和快速采集速率的情况下,在狭窄的时空范围内探测液氦的声学特性。我们从0.90和2.17 K之间的受激布里渊增益谱确定超流体氦4的第一声的速度,并将其与众所周知的可用数据进行比较,从而验证了我们的实验方法。

更新日期:2021-03-08
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