arXiv 1906.062362019-06physics.atom-ph

微机械波导中的冷原子：原子-光子相互作用的新平台

Cold atoms in micromachined waveguides: a new platform for atom-photon interaction

Elisa Da Ros, Nathan Cooper, Jonathan Nute, Lucia Hackermueller

备注：: 7 pages, 4 figures
发表信息：: Phys. Rev. Research 2, 033098 (2020)
DOI：: 10.1103/PhysRevResearch.2.033098

摘要：

混合量子设备，结合原子和光子，可以利用两者的好处，使可扩展的架构，量子计算和量子通信，以及芯片级传感器和单光子源。这种器件的生产取决于它们的原子和光子组件之间的接口的开发。这应该是紧凑的，坚固的，并与两个领域的现有技术兼容。在这里，我们展示了这样一个接口。冷铯原子被捕获在光纤中的横向的、直径为30 $μ$ m的通孔内，该通孔通过激光微加工产生。当被引导的光与铯$D_2$线共振时，高达87%的光被原子吸收。相应的每单位长度的光学深度为700 cm $^{-1}$，高于任何报告的可比系统。这对于可扩展性和可扩展性非常重要。该技术在光波导芯片和其他现有的光子系统中同样有效，为基础研究提供了新的平台。

英文摘要：

Hybrid quantum devices, incorporating both atoms and photons, can exploit the benefits of both to enable scalable architectures for quantum computing and quantum communication, as well as chip-scale sensors and single-photon sources. Production of such devices depends on the development of an interface between their atomic and photonic components. This should be compact, robust and compatible with existing technologies from both fields. Here we demonstrate such an interface. Cold cesium atoms are trapped inside a transverse, 30 $μ$m diameter through-hole in an optical fiber, created via laser micromachining. When the guided light is on resonance with the cesium $D_2$ line, up to 87% of it is absorbed by the atoms. The corresponding optical depth per unit length is 700 cm$^{-1}$, higher than any reported for a comparable system. This is important for miniaturisation and scalability. The technique can be equally effective in optical waveguide chips and other existing photonic systems, providing a new platform for fundamental research.

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