Efficient Extraction of Zero-Phonon-Line Photons from Single Nitrogen-Vacancy Centers in an Integrated GaP-on-Diamond Platform
Efficient Extraction of Zero-Phonon-Line Photons from Single Nitrogen-Vacancy Centers in an Integrated GaP-on-Diamond Platform
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DOI：
10.1103/physrevapplied.6.011001
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发表时间：
2016-07-29
影响因子：
4.6
通讯作者：
Fu, Kai-Mei C.
中科院分区：
文献类型：
--
作者：
Gould, Michael;Schmidgall, Emma R.;Fu, Kai-Mei C.
利用金刚石中的氮空位（NV）中心进行双节点量子网络的缩放受到从单中心收集零声子线（ZPL）光子的低概率的限制。在这里，我们展示了金刚石圆盘上的GaP谐振器，它将来自单个NV中心的ZPL光子谐振耦合到单模波导。在这些器件中，单个NV中心在光激发后将ZPL光子发射到波导模式中的概率可以达到9%，这是由于ZPL发射的谐振增强和谐振器与波导之间的有效耦合的组合。我们验证了发射的单光子性质，并实验证明了一组设备的高波导光子数和大量的珀塞尔增强。这些设备可以实现基于NV中心的可扩展集成量子网络。
Scaling beyond two-node quantum networks using nitrogen-vacancy (NV) centers in diamond is limited by the low probability of collecting zero-phonon-line (ZPL) photons from single centers. Here, we demonstrate GaP-on-diamond disk resonators which resonantly couple ZPL photons from single NV centers to single-mode waveguides. In these devices, the probability of a single NV center emitting a ZPL photon into the waveguide mode after optical excitation can reach 9%, due to a combination of resonant enhancement of the ZPL emission and efficient coupling between the resonator and waveguide. We verify the single-photon nature of the emission and experimentally demonstrate both high in-waveguide photon numbers and substantial Purcell enhancement for a set of devices. These devices may enable scalable integrated quantum networks based on NV centers.