DLC膜对金刚石纳米柱NV色心发光收集强度的影响  

Influence of DLC film on luminescence collection intensity of NV center of diamond nanopillars

作　　者：李文斌 谭心[1] 潘超 贺占清 杨桥 LI Wenbin;TAN Xin;PAN Chao;HE Zhanqing;YANG Qiao(College of Mechanical Engineering,Inner Mongolia University of Science&Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学机械工程学院,内蒙古包头014010

出　　处：《量子电子学报》2024年第5期793-801,共9页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(62365015,61765012);内蒙古自然科学基金(2023MS05047,2019MS05008);国家重点研发计划(2017YFF0207200,2017YFF0207203);内蒙古自治区科技创新引导项目(2017CYXD-2,KCBJ2018031);内蒙古自治区直属高校基本科研业务费项目(2023RCTD011,2023YXXS012);内蒙古科技大学青年基金项目(202/0303022006)。

摘　　要：金刚石氮空位(NV)色心发光收集强度的提高是实现单光子源技术的关键。本工作将锥状的类金刚石(DLC)梯度减反膜引入纳米柱色心单光子源中,旨在从色心的自发辐射速率与光子收集效率两方面提高NV色心的发光收集强度。采用时域有限差分(FDTD)法对带有DLC膜的金刚石纳米柱复合结构进行了光学仿真,探究了不同结构参数的DLC薄膜对金刚石纳米柱NV色心光子收集强度、出射效率及自发辐射速率的影响,并且通过优化得到了最大收集强度下的结构参数。仿真结果表明,引入DLC膜能够使金刚石纳米柱中NV色心获得更高的光子出射效率(≥1%),并且能够改变纳米柱内部电场分布,使色心自发辐射速率增加16.8%,最终使光子的总收集强度增加15.5%。Improving the luminescence collection intensity of diamond NV color center is the key to realize single photon source.A tapered diamond-like carbon(DLC)gradient antireflection film is introduced into a diamond nanocolumn color center single photon source,aiming to improve the luminescence collection intensity of NV color center from the aspects of spontaneous radiation rate and photon collection efficiency of color center.The finite difference time-domain(FDTD)method is used to simulate the composite structure optically,the effects of DLC film with different structural parameters on the photon collection intensity,emission efficiency and spontaneous radiation rate of NV color center of diamond nanopillar are investigated,and the structural parameters at the maximum collection intensity are obtained through optimization.The simulation results show that the introduction of DLC film can make the NV color centers in diamond nanopillars achieve a higher photon emission efficiency(≥1%),change the internal electric field distribution of the nanopillar,increasing the spontaneous radiation rate of color center by 16.8%,and finally increase the total photon collection intensity by 15.5%.

关 键 词：量子光学 收集强度 时域有限差分 金刚石纳米柱NV色心 类金刚石梯度减反膜 自发辐射速率 

分 类 号：TN303[电子电信—物理电子学]