Körber Jonathan, Heiler Jonah, Fuchs Philipp, Flad Philipp, Hesselmeier Erik, Kuna Pierre, Ul-Hassan Jawad, Knolle Wolfgang, Becher Christoph, Kaiser Florian, Wrachtrup Jörg
Third Institute of Physics, University of Stuttgart, Allmandring 13, 70569 Stuttgart, Germany.
Materials Research and Technology (MRT) Department, Luxembourg Institute of Science and Technology (LIST), 4422 Belvaux, Luxembourg.
Nano Lett. 2024 Jul 31;24(30):9289-9295. doi: 10.1021/acs.nanolett.4c02162. Epub 2024 Jul 17.
Solid state quantum emitters are a prime candidate in distributed quantum technologies since they inherently provide a spin-photon interface. An ongoing challenge in the field, however, is the low photon extraction due to the high refractive index of typical host materials. This challenge can be overcome using photonic structures. Here, we report the integration of V2 centers in a cavity-based optical antenna. The structure consists of a silver-coated, 135 nm-thin 4H-SiC membrane functioning as a planar cavity with a broadband resonance yielding a theoretical photon collection enhancement factor of ∼34. The planar geometry allows us to identify over 20 single V2 centers at room temperature with a mean (maximum) count rate enhancement factor of 9 (15). Moreover, we observe 10 V2 centers with a mean absorption line width below 80 MHz at cryogenic temperatures. These results demonstrate a photon collection enhancement that is robust to the lateral emitter position.
固态量子发射器是分布式量子技术中的主要候选者，因为它们本质上提供了一个自旋-光子界面。然而，该领域目前面临的一个挑战是，由于典型主体材料的高折射率，光子提取效率较低。利用光子结构可以克服这一挑战。在此，我们报告了V2中心在基于腔的光学天线中的集成。该结构由一个镀银的、135纳米厚的4H-SiC膜组成，作为一个具有宽带共振的平面腔，理论光子收集增强因子约为34。这种平面几何结构使我们能够在室温下识别出20多个单个V2中心，平均（最大）计数率增强因子为9（15）。此外，我们在低温下观察到10个平均吸收线宽低于80兆赫兹的V2中心。这些结果表明，光子收集增强对横向发射器位置具有鲁棒性。
