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Enhancing Fluorescence of Shallow Nitrogen-Vacancy Centers in Diamond by Surface Coating with Titanium Oxide Layers
Wen-long Zhang,Li-ren Lou,Wei Zhu,Guan-zhong Wang*
Author NameAffiliationE-mail
Wen-long Zhang Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Physics, University of Science and Technology of China, Hefei 230026, China gzwang@ustc.edu.cn 
Li-ren Lou Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Physics, University of Science and Technology of China, Hefei 230026, China gzwang@ustc.edu.cn 
Wei Zhu Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Physics, University of Science and Technology of China, Hefei 230026, China gzwang@ustc.edu.cn 
Guan-zhong Wang* Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Physics, University of Science and Technology of China, Hefei 230026, China gzwang@ustc.edu.cn 
Abstract:
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.
Key words:  Shallow NV- center, Titanium oxide coating layers, Charge state stabilization, Fluorescence enhancement
FundProject:
表面氧化钛涂层增强金刚石中浅层NV色心的荧光强度
张文龙,楼立人,祝 巍,王冠中*
摘要:
本文利用原子层沉积技术在金刚石表面沉积了一层氧化钛涂层,该方法使得金刚石中的浅层(深度小于10 nm)NV-色心的电荷态变得稳定,同时其荧光强度增强至大约原本的2倍. 这种表面涂层技术能够为固态量子体系提供厚度可控的保护层或钝化层,同时又不损伤或腐蚀体系表面,有望成为一种固态量子体系钝化或封装的方法.
关键词:  浅层NV-色心,氧化钛涂层,电荷态稳定性,荧光增强
DOI:10.1063/1674-0068/cjcp1904069
分类号: