论文标题
亚柱磁体光腔
Sub-pico-liter magneto-optical cavities
论文作者
论文摘要
通过铁磁磁棒的微波转换已受到MM尺度窃窃库模式谐振器的光学耦合率的限制。为了克服这一限制，我们提出并展示了一个开放的磁光腔，其中含有薄膜的Yttrium Iron Garnet（YIG）。我们实现了0.1 PL（100 $ $ M $^{3} $）光学模式，$ \ sim $ 50 $ 50倍，比以前的设备小50倍。由此，我们估计磁通单光子耦合率为$ g \ \ \ \最大hz。这种开放式空腔设计提供了波长尺度模式量，小极化分裂和良好的磁光模式重叠的前景。通过可实现的进一步改进和优化，有效的微波光转换和镁冷却设备成为现实的可能性。
Microwave-to-optical conversion via ferromagnetic magnons has so-far been limited by the optical coupling rates achieved in mm-scale whispering gallery mode resonators. Towards overcoming this limitation, we propose and demonstrate an open magneto-optical cavity containing a thin-film of yttrium iron garnet (YIG). We achieve a 0.1 pL (100 $μ$m$^{3}$) optical mode volume, $\sim$50 times smaller than previous devices. From this, we estimate the magnon single-photon coupling rate is $G\approx50$ Hz. This open cavity design offers the prospect of wavelength scale mode volumes, small polarization splittings, and good magneto-optical mode overlap. With achievable further improvements and optimization, efficient microwave-optical conversion and magnon cooling devices become a realistic possibility.
