Kuzin Aleksei author Elmanov Ilia author Kovalyuk Vadim author An Pavel author Goltsman Gregory author 2020 Here we presented the numerical results for the calculation of focusing grating coupler efficiency in the visible wavelength range. Using the finite element method, the optimal geometric parameters, including filling factor and grating period for a central wavelength of 637 nm, were found. Obtained results allow to input/output single-photon radiation from NV-centers, and can be used for research and development of a scalable on-chip quantum optical computing. NV-centers focusing grating coupler exported from refbase (https://db.rplab.ru/refbase/show.php?record=1841), last updated on Thu, 12 Aug 2021 18:16:53 +0000 text 10.46354/i3m.2020.emss.051 Kuzin_etal2020 32nd European Modeling & Simulation Symposium 2020 conference publication 349 353 978-88-85741-44-7 2724-0029