Enhancing Fluorescence of Shallow Nitrogen-Vacancy Centers in Diamond by Surface Coating with Titanium Oxide Layers  

表面氧化钛涂层增强金刚石中浅层NV色心的荧光强度（英文）

作　　者：Wen-long Zhang Li-ren Lou Wei Zhu Guan-zhong Wang 

机构地区：[1]Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Physics, University of Science and Technology of China, Hefei 230026, China

出　　处：《Chinese Journal of Chemical Physics》2019年第5期521-524,共4页化学物理学报（英文）

基　　金：National Natu- ral Science Foundation of China (No.11374280 and No.50772110). The authors wish to thank Guo-ping Guo, Jie You and Yang Li from the Key Lab of Quan- tum Information for the support of electron beam lithography. We also thank Ming-ling Li at University of Science and Technology of China for the technical support of ALD.

摘　　要：We present an enhancement of the fluorescence of shallow(<10 nm) nitrogen-vacancy(NV^-)centers by using atomic layer deposition to deposit titanium oxide layers on the diamond surface. In this way, the shallow NV-center charge states were stabilized, leading to the increasing fluorescence intensity of about 2 times. This surface coating technique could produce a protective layer of controllable thickness without any damages to the solid-state quantum system surface, which might be an approach to the further passivation or packaging techniques for the solid-state quantum devices.

关 键 词：SHALLOW NV- center TITANIUM oxide coating layers Charge state stabilization FLUORESCENCE enhancement 

分 类 号：O6[理学—化学]