A monolithic immersion metalens for imaging solid-state quantum emitters
A monolithic immersion metalens for imaging solid-state quantum emitters
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DOI：
10.1038/s41467-019-10238-5
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发表时间：
2019-06-03
影响因子：
16.6
通讯作者：
Bassett, Lee C.
中科院分区：
文献类型：
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作者：
Huang, Tzu-Yung;Grote, Richard R.;Bassett, Lee C.
金刚石氮空位（NV）中心等量子发射体是一系列量子技术的基础。然而，材料界面的折射和反射阻碍了光子的收集，并且发射器的原子尺度需要使用自由空间光学测量装置，这阻止了量子器件的封装。为了克服这些限制，我们设计并制造了一个由纳米级金刚石柱组成的超表面，作为浸没透镜来收集和准直单个NV中心的发射。超构透镜的数值孔径大于1.0，实现了量子发射体的高效光纤耦合。这种灵活的设计将导致量子器件在各种宿主材料中的小型化，以及形成单光子发射的超表面的发展，以耦合到光学腔或基于其量子态路由光子。
Quantum emitters such as the diamond nitrogen-vacancy (NV) center are the basis for a wide range of quantum technologies. However, refraction and reflections at material interfaces impede photon collection, and the emitters' atomic scale necessitates the use of free space optical measurement setups that prevent packaging of quantum devices. To overcome these limitations, we design and fabricate a metasurface composed of nanoscale diamond pillars that acts as an immersion lens to collect and collimate the emission of an individual NV center. The metalens exhibits a numerical aperture greater than 1.0, enabling efficient fiber coupling of quantum emitters. This flexible design will lead to the miniaturization of quantum devices in a wide range of host materials and the development of metasurfaces that shape single-photon emission for coupling to optical cavities or route photons based on their quantum state.