磁机械谐振器中的磁振子频率梳
Magnonic frequency comb in the magnomechanical resonator
AI总结：
本研究通过磁机械相互作用在带巨机械振荡的谐振器中生成含20条梳齿的磁振子频率梳，揭示热效应引发的梳体周期振荡，实现注入锁定下的频率间隔稳定调控，为其在传感与计量领域的应用奠基。
摘要：
光学频率梳是由等间距、相位相干的窄谱线组成的光辐射频谱，最初发明于激光领域，用于频率计量。迄今为止，磁振子系统中尚未实现与光学频率梳直接对应的同类结构。在本实验中，我们通过磁机械相互作用，在伴随巨机械振荡的谐振器中生成了一种新型磁振子频率梳。我们观测到该磁振子频率梳包含多达20条梳齿，梳齿间距对应10.08 MHz的机械频率。强泵浦功率引发的热效应会导致磁振子频移产生循环振荡，进而使磁振子频率梳出现周期性振荡。此外，我们还证明了可通过注入锁定实现磁振子频率梳频率间隔的稳定与调控。本研究为磁振子频率梳在传感与计量领域的应用奠定了基础。
英文摘要：
An optical frequency comb is a spectrum of optical radiation which consists of evenly spaced and phase-coherent narrow spectral lines and is initially invented in laser for frequency metrology purposes. A direct analogue of frequency combs in the magnonic systems has not been demonstrated to date. In our experiment, we generate a new magnonic frequency comb in the resonator with giant mechanical oscillation through the magnomechanical interaction. We observe the magnonic frequency comb contains up to 20 comb lines, which are separated to the mechanical frequency of the 10.08 MHz. The thermal effect based on the strong pump power induces the cyclic oscillation of the magnon frequency shift, which leads to a periodic oscillation of the magnonic frequency comb. Moreover, we demonstrate the stabilization and control of the frequency spacing of the magnonic frequency comb via injection locking. Our work lays the groundwork of magnonic frequency combs for sensing and metrology.
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