相互穿插的矩形光栅之间Casimir力的强几何依赖性
Strong geometry dependence of the Casimir force between interpenetrated rectangular gratings
AI总结：
本研究通过片上检测平台测量了相互穿插的矩形光栅间的Casimir力，发现其具有极强的几何依赖性，与近程力近似偏差达约500倍，且穿插后力变为非零且与位移无关，证明光栅可强烈调控纳米机械组件间的相互作用。
摘要：
量子涨落引起两平行导电板之间的Casimir力，其大小随间距减小而单调增加。通过在表面引入纳米级光栅，最新进展为在复杂几何形状中控制Casimir力开辟了机会。在此，我们在以前无法达到的范围内测量两个矩形光栅之间的Casimir力。使用片上检测平台，我们实现了两个光栅之间的精确对准，使它们随着间距减小而相互穿插。就在相互穿插发生之前，测得的Casimir力被发现具有比以前实验强得多的几何依赖性，与近程力近似（PFA）的偏差达到约500倍。在光栅相互穿插之后，Casimir力变为非零且与位移无关。这项工作表明，光栅的存在可以强烈改变Casimir力，以控制纳米机械组件之间的相互作用。
英文摘要：
Quantum fluctuations give rise to Casimir forces between two parallel conducting plates, the magnitude of which increases monotonically as the separation decreases. By introducing nanoscale gratings to the surfaces, recent advances have opened opportunities for controlling the Casimir force in complex geometries. Here, we measure the Casimir force between two rectangular gratings in regimes not accessible before. Using an on-chip detection platform, we achieve accurate alignment between the two gratings so that they interpenetrate as the separation is reduced. Just before interpenetration occurs, the measured Casimir force is found to have a geometry dependence that is much stronger than previous experiments, with deviations from the proximity force approximation reaching a factor of ~500. After the gratings interpenetrate each other, the Casimir force becomes non-zero and independent of displacement. This work shows that the presence of gratings can strongly modify the Casimir force to control the interaction between nanomechanical components.
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