1. Enhancing fluorescence of shallow nitrogen-vacancy centers in diamond by surface coating with titanium oxide layers
- Author
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Wei Zhu, Wenlong Zhang, Liren Lou, and Guanzhong Wang
- Subjects
Materials science ,Passivation ,business.industry ,Diamond ,chemistry.chemical_element ,02 engineering and technology ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Nitrogen ,0104 chemical sciences ,Titanium oxide ,Atomic layer deposition ,Surface coating ,chemistry ,Vacancy defect ,engineering ,Optoelectronics ,Physical and Theoretical Chemistry ,0210 nano-technology ,business ,Layer (electronics) - 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.
- Published
- 2019