Levitated Optomechanics with Meta-Atoms,Physical Review Letters

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Levitated Optomechanics with Meta-Atoms
Physical Review Letters ( IF 8.1 ) Pub Date : 2023-06-08 , DOI: 10.1103/physrevlett.130.233601
Sergei Lepeshov ₁ , Nadine Meyer _{2,

3} , Patrick Maurer _{4,

5} , Oriol Romero-Isart _{4,

5} , Romain Quidant _{2,

3}

Affiliation

We propose to introduce additional control in levitated optomechanics by trapping a meta-atom, i.e., a subwavelength and high-permittivity dielectric particle supporting Mie resonances. In particular, we theoretically demonstrate that optical levitation and center-of-mass ground-state cooling of silicon nanoparticles in vacuum is not only experimentally feasible but it offers enhanced performance over widely used silica particles in terms of trap frequency, trap depth, and optomechanical coupling rates. Moreover, we show that, by adjusting the detuning of the trapping laser with respect to the particle’s resonance, the sign of the polarizability becomes negative, enabling levitation in the minimum of laser intensity, e.g., at the nodes of a standing wave. The latter opens the door to trapping nanoparticles in the optical near-field combining red and blue-detuned frequencies, in analogy to two-level atoms, which is of interest for generating strong coupling to photonic nanostructures and short-distance force sensing.

中文翻译：

元原子悬浮光力学

我们建议通过捕获超原子（即支持米氏共振的亚波长和高介电常数介电粒子）在悬浮光力学中引入额外的控制。特别是，我们从理论上证明，真空中硅纳米颗粒的光学悬浮和质心基态冷却不仅在实验上可行，而且在陷阱频率、陷阱深度和光机械方面比广泛使用的二氧化硅颗粒提供了增强的性能耦合率。此外，我们表明，通过调整捕获激光相对于粒子共振的失谐，极化率的符号变为负，从而能够在最小激光强度下实现悬浮，例如在驻波的节点处。

更新日期：2023-06-09

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