Study on the Enhancement of Diamond Fluorescence Characteristics by Multi-layer Anti-reflection Coating
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2019-06-01 |
| Authors | Xiaojing Li, Libo Zhao, Zhikang Li, Guoxi Luo, Mingzhi Yu |
| Institutions | Xiāan Jiaotong University |
Abstract
Section titled āAbstractāQuantum sensing has become a rapidly growing research within the area of sensor, which can break through the limits of traditional physical sensing and make sensing accuracy to the nanometer scale. Meanwhile nitrogen-vacancy (NV) center in bulk diamond as a sensor has varieties of applications because of its excellent characteristics. However, there are large optical reflection and low fluorescence collection efficiency at the diamond-air interface because of the large refractive index gap between diamond and air, thereby reducing the sensing sensitivity. In this work, we report a multi-layer anti-reflection coating and fabrication on the surface of diamond with genetic algorithm to solve optimization value of the average reflectance Rave in the wavelength range of 600-800 nm. And we fabricate SiO <sub xmlns:mml=āhttp://www.w3.org/1998/Math/MathMLā xmlns:xlink=āhttp://www.w3.org/1999/xlinkā>2</sub> -Si <sub xmlns:mml=āhttp://www.w3.org/1998/Math/MathMLā xmlns:xlink=āhttp://www.w3.org/1999/xlinkā>3</sub> N <sub xmlns:mml=āhttp://www.w3.org/1998/Math/MathMLā xmlns:xlink=āhttp://www.w3.org/1999/xlinkā>4</sub> double-layer anti-reflection coating on diamond substrate by plasma chemical vapor deposition. Experiment results show that with an anti-reflection coating, the fluorescence collection efficiency is significantly improved, and the average transmittance in the wavelength range of 600-800 nm is increased from 82.8% to 96.7%.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2011 - Time-keeping with electron spin states in diamond
- 2012 - Gyroscopes based on nitrogenvacancy centers in diamond [Crossref]
- 2016 - The quanta image sensor: every photon counts [Crossref]