论文标题
带有超高反射率光子晶体的空腔光学机械双疗法
Cavity optomechanical bistability with an ultrahigh reflectivity photonic crystal membrane
论文作者
论文摘要
具有子波长时期成立的光子晶体（PHC）膜提供了高反射率，低质量和高机械质量因子的独特组合。我们证明了一个PHC膜，我们用作finese finesse的Fabry-Perot腔的一面镜子，高达$ f = 35,000（500）$，对应于创纪录的高PHC反射率$ r = 0.999835（6）$。基本的机械频率为426 kHz，是光线宽的两倍以上，将其牢固地放置在解决方案中。真空中的机械质量因子为$ q = 1.1（1）\ times 10^6 $，使我们能够实现单光子合作的值，高达$ {\ cal c} _0 = 6.6 \ times10^{ - 3} $。我们很容易将光力的双重性视为腔传递中的滞后性。随着输入功率的提升远远超出了双重性阈值，即使在存在空气阻尼的情况下，动力反性也会诱导高于1〜MHz的强机械振荡。该平台将促进光学机械，精确感应和光学诱导的双疗法的应用的进步。
Photonic crystal (PhC) membranes patterned with sub-wavelength periods offer a unique combination of high reflectivity, low mass, and high mechanical quality factor. We demonstrate a PhC membrane that we use as one mirror of a Fabry-Perot cavity with finesse as high as $F=35,000(500)$, corresponding to a record high PhC reflectivity of $R=0.999835(6)$. The fundamental mechanical frequency is 426 kHz, more than twice the optical linewidth, placing it firmly in the resolved-sideband regime. The mechanical quality factor in vacuum is $Q=1.1(1)\times 10^6$, allowing us to achieve values of the single-photon cooperativity as high as ${\cal C}_0=6.6\times10^{-3}$. We easily see optomechanical bistability as hysteresis in the cavity transmission. As the input power is raised well beyond the bistability threshold, dynamical backaction induces strong mechanical oscillation above 1~MHz, even in the presence of air damping. This platform will facilitate advances in optomechanics, precision sensing, and applications of optomechanically-induced bistability.
