Attonewton force detection using microspheres in a dual-beam optical trap in high vacuum
Attonewton force detection using microspheres in a dual-beam optical trap in high vacuum
复制标题
DOI：
10.1103/physreva.91.051805
复制
发表时间：
2015-05-26
影响因子：
2.9
通讯作者：
Geraci, Andrew A.
中科院分区：
文献类型：
--
作者：
Ranjit, Gambhir;Atherton, David P.;Geraci, Andrew A.
我们描述了在高真空双光束光学偶极阱中实现激光冷却二氧化硅微球作为力传感器。使用这个系统，我们已经证明了陷阱寿命超过几天，attonewton力检测能力，和广泛的可调性在捕获和冷却参数。测量已经进行了带电和中性珠校准检测器的灵敏度。这项工作建立了双光束光学偶极阱在高真空中具有长平均时间的精确力测量的适用性，并使未来的应用包括研究短距离的引力平方反比定律违反，卡西米尔力，加速度传感和量子光学力学。
We describe the implementation of laser-cooled silica microspheres as force sensors in a dual-beam optical dipole trap in high vacuum. Using this system we have demonstrated trap lifetimes exceeding several days, attonewton force detection capability, and wide tunability in trapping and cooling parameters. Measurements have been performed with charged and neutral beads to calibrate the sensitivity of the detector. This work establishes the suitability of dual-beam optical dipole traps for precision force measurement in high vacuum with long averaging times, and enables future applications including the study of gravitational inverse square law violations at short range, Casimir forces, acceleration sensing, and quantum optomechanics.