Efficient Photon Collection from a Nitrogen Vacancy Center in a Circular Bullseye Grating
Luozhou Li, Edward H. Chen, Jiabao Zheng +7 more
Efficient collection of the broadband fluorescence from the diamond nitrogen vacancy (NV) center is essential for a range of applications in sensing, on-demand single photon generation, and quantum information processing. Here, we introduce a circular "bullseye" diamond grating which enables a collected photon rate of (2.7 ± 0.09) × 10(6) counts per second from a single NV with a spin coherence time of 1.7 ± 0.1 ms. Back-focal-plane studies indicate efficient redistribution of the NV photoluminescence into low-NA modes by the bullseye grating.
arXiv:1409.3068•Nano Letters•Feb 25, 2015•231 citations