najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2019-10-3-266-272najo-559Research ArticlePHYSICSФИЗИКАResonant dielectric waveguide-based nanostructure for efficient interaction with color centers in nanodiamondsSergaevaO. N.

St. Petersburg 197101

VolkovI. A.

St. Petersburg 197101

SavelevR. S.

St. Petersburg 197101

r.savelev@metalab.ifmo.ruITMO UniversityRussian Federation201907082025103266272Copyright © Sergaeva O.N., Volkov I.A., Savelev R.S., 20252025Sergaeva O.N., Volkov I.A., Savelev R.S.Sergaeva O.N., Volkov I.A., Savelev R.S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/559

Diamond nanoparticles containing single color centers are considered to be one of the most promising realizations of the sources of single photons required for many potential applications in quantum telecommunication and quantum computing systems. Their implementation in practical schemes, however, requires a sufficient increase in their brightness, including the enhancement of both emission and collection efficiency. In this work, we propose a design of a compact planar structure composed of a dielectric periodic cavity coupled with a strip waveguide that is particularly suitable for improving optical characteristics of color centers embedded in a nanodiamond placed inside the structure. We numerically demonstrate that such scheme permits the achievement of simultaneous increase of emission rate of color centers by ≈ 50 times in a spectral range ≈ 2 nm, and up to ≈ 85 % out-coupling efficiency of emission to the dielectric strip waveguides. We analyze the main factors that decrease the performance of the proposed arrangement and discuss the possible ways for restoring it.

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The authors declare that there are no conflicts of interest present.