We report dispersive coupling of an optically trapped nanoparticle to the field of a Fabry–Perot cavity in high vacuum. We demonstrate nanometer-level control in positioning the particle with respect to the cavity field, which allows access to linear, quadratic, and tertiary optomechanical interactions in the resolved sideband regime. We determine all relevant coupling rates of the system, i.e. mechanical and optical losses as well as optomechanical interaction, and obtain a quantum cooperativity of C Q = 0.01. Based on the presented performance, the regime of strong cooperativity ( C Q > 1) is clearly within reach by further decreasing the mode volume of the cavity.

中文翻译：

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高真空下的悬浮腔光力学

我们报道了在高真空下，光学捕获的纳米粒子与法布里-珀罗腔的场的色散耦合。我们展示了相对于腔场定位粒子的纳米级控制，它允许在解析的边带范围内访问线性，二次和三次光机械相互作用。我们确定系统的所有相关耦合速率，即机械和光学损耗以及光机械相互作用，并获得CQ = 0.01的量子合作性。根据给出的性能，通过进一步减小腔的模式体积，很明显可以实现强合作性（CQ> 1）。