title: Efficient photon collection from a nitrogen vacancy center in a circular bullseye grating.
abstract: 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.
authors.affiliation: Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States.
authors.forename: Luozhou
authors.initials: L
authors.lastname: Li
authors.forename: Edward H
authors.initials: EH
authors.lastname: Chen
authors.forename: Jiabao
authors.initials: J
authors.lastname: Zheng
authors.forename: Sara L
authors.initials: SL
authors.lastname: Mouradian
authors.forename: Florian
authors.initials: F
authors.lastname: Dolde
authors.forename: Tim
authors.initials: T
authors.lastname: Schröder
authors.forename: Sinan
authors.initials: S
authors.lastname: Karaveli
authors.forename: Matthew L
authors.initials: ML
authors.lastname: Markham
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Twitchen
authors.forename: Dirk
authors.initials: D
authors.lastname: Englund
keywords: circular grating; nanostructured diamonds; nitrogen-vacancy center; quantum sensing