Chinese Journal of Quantum Electronics ›› 2025, Vol. 42 ›› Issue (2): 255-264.doi: 10.3969/j.issn.1007-5461.2025.02.011

• Quantum Optics • Previous Articles     Next Articles

Study on fluorescence collection efficiency of diamond nanopillar enhanced color center

TAN Xin1,2*, HE Zhanqing1,2 , YANG Qiao1,2 , WANG Jian1,2 , CANG Lei 1,2 , DU Yanlong1,2 , QI Hui 1,2   

  1. 1 School of Mechanical Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, China; 2 Key Laboratory of Micro/Nano Structure Design and Manufacturing Technology, Inner Mongolia University of Science and Technology, Baotou 014010, China
  • Received:2023-09-20 Revised:2023-10-27 Published:2025-03-28 Online:2025-03-28

Abstract: Diamond nanopillars can improve the photon emission efficiency of color centers and have a focusing effect on the emitted photons. By using the time-domain finite-difference method, the effects of structural changes such as diameter, height and color center position of diamond nanopillar on parameters such as Purcell factor, photon transmittance and photon extraction efficiency of color centers in the nanopillars are studied in this work, the mechanism of the nanopillar structure enhancing the luminescence of color centers is discussed, and the optimal nanopillar structure parameters are explored to obtain the maximal total fluorescence collection of color centers. It is found that the total fluorescence collection of color centers under the optimal structure is 17 times

Key words: quantum optics, fluorescence enhancement, time-domain finite-difference method, nanopillar, diamond

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