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Li, Luozhou; Chen, Edward H; Zheng, Jiabao; Mouradian, Sara L; Dolde, Florian; Schröder, Tim; Karaveli, Sinan; Markham, Matthew L; Twitchen, Daniel J; Englund, Dirk
Nano letters, 03/2015, Letnik: 15, Številka: 3Journal Article
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) × 106 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.
