Equilibrium Parametric Amplification in Raman-Cavity Hybrids,Physical Review Letters

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Equilibrium Parametric Amplification in Raman-Cavity Hybrids
Physical Review Letters ( IF 8.1 ) Pub Date : 2024-09-09 , DOI: 10.1103/physrevlett.133.116901
H. P. Ojeda Collado _{1,

2} , Marios H. Michael ₃ , Jim Skulte _{1,

2} , Angel Rubio _{3,

4} , Ludwig Mathey _{1,

2}

Affiliation

Parametric resonances and amplification have led to extraordinary photoinduced phenomena in pump-probe experiments. While these phenomena manifest themselves in out-of-equilibrium settings, here, we present the striking result of parametric amplification in equilibrium. We demonstrate that quantum and thermal fluctuations of a Raman-active mode amplifies light inside a cavity, at equilibrium, when the Raman mode frequency is twice the cavity mode frequency. This noise-driven amplification leads to the creation of an unusual parametric Raman polariton, intertwining the Raman mode with cavity squeezing fluctuations, with smoking gun signatures in Raman spectroscopy. In the resonant regime, we show the emergence of not only quantum light amplification but also localization and static shift of the Raman mode. Apart from the fundamental interest of equilibrium parametric amplification, our Letter suggests a resonant mechanism for controlling Raman modes and thus matter properties by cavity fluctuations. We conclude by outlining how to compute the Raman-cavity coupling, and suggest possible experimental realizations.

中文翻译：

拉曼腔混合体中的平衡参数放大

参数共振和放大导致了泵浦探针实验中非凡的光致现象。虽然这些现象在非平衡环境中表现出来，但在这里，我们展示了平衡状态下参数放大的惊人结果。我们证明，当拉曼模式频率是腔模式频率的两倍时，拉曼活性模式的量子和热涨落会在平衡状态下放大腔内的光。这种噪声驱动的放大导致了一种不寻常的参数拉曼极化子的产生，将拉曼模式与空腔挤压波动交织在一起，并在拉曼光谱中形成了确凿无疑的特征。在共振状态下，我们不仅展示了量子光放大的出现，还展示了拉曼模式的局域化和静态位移。除了平衡参数放大的基本利益之外，我们的信还提出了一种通过腔涨落控制拉曼模式以及物质特性的谐振机制。最后，我们概述了如何计算拉曼腔耦合，并提出了可能的实验实现。

更新日期：2024-09-10

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