Sub-hertz optomechanically induced transparency with a kilogram-scale mechanical oscillator
Sub-hertz optomechanically induced transparency with a kilogram-scale mechanical oscillator
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DOI：
10.1103/physreva.100.013853
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发表时间：
2018-12
影响因子：
2.9
通讯作者：
T. Bodiya;V. Sudhir;C. Wipf;N. Smith;A. Buikema;A. Kontos;Hang Yu;N. Mavalvala
中科院分区：
文献类型：
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作者：
T. Bodiya;V. Sudhir;C. Wipf;N. Smith;A. Buikema;A. Kontos;Hang Yu;N. Mavalvala
悬挂反射镜的光学干涉仪是目前所有音频引力波探测器的原型。在这种干涉仪中，反射镜的运动和循环光场之间的辐射压力相互作用代表了光-物质耦合的原始形式，这主要是由于30年来在开发具有低机械耗散的高质量光学材料方面的努力。然而，在目前所有的悬浮干涉仪中，辐射压力相互作用太弱而不能作为有用的资源，并且太强而不能忽略。在这里，我们展示了一个米长的干涉仪与悬挂的镜子，有效质量125\phantom {\rule{0. 28 em}{0 ex}}\mathrm{g}$，其中的辐射压力相互作用增强强光泵浦，实现50的合作。结合适度的解决边带操作，这一制度有效地探测通过光机械诱导的透明性弱的共振探针。机械振荡器的低谐振频率和高Q值使我们能够在室温下展示仅100 mHz宽的透明窗口。再加上接近1（$\ensuremath{\approx} 99.9%$）的输出耦合效率，我们的系统饱和的理论延迟带宽产品，使其成为一个光学缓冲器能够秒长的存储时间。
Optical interferometers with suspended mirrors are the archetype of all current audio-frequency gravitational-wave detectors. The radiation pressure interaction between the motion of the mirrors and the circulating optical field in such interferometers represents a pristine form of light-matter coupling, largely due to 30 years of effort in developing high-quality optical materials with low mechanical dissipation. However, in all current suspended interferometers, the radiation pressure interaction is too weak to be useful as a resource, and too strong to be neglected. Here, we demonstrate a meter-long interferometer with suspended mirrors, of effective mass $125\phantom{\rule{0.28em}{0ex}}\mathrm{g}$, where the radiation pressure interaction is enhanced by strong optical pumping to realize a cooperativity of 50. In conjunction with modest resolved-sideband operation, this regime is efficiently probed via optomechanically induced transparency of a weak on-resonant probe. The low resonant frequency and high-Q of the mechanical oscillator allows us to demonstrate transparency windows barely 100 mHz wide at room temperature. Together with a near-unity ($\ensuremath{\approx}99.9%$) out-coupling efficiency, our system saturates the theoretical delay-bandwidth product, rendering it an optical buffer capable of seconds-long storage times.