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Enhancement of fluorescence from nitrogen-vacancy center ensemble in bulk diamond with broadband antireflection coatings
- Source :
- AIP Advances, Vol 10, Iss 8, Pp 085124-085124-6 (2020)
- Publication Year :
- 2020
- Publisher :
- AIP Publishing, 2020.
-
Abstract
- The negatively charged nitrogen-vacancy (NV−) center in diamond is a promising platform for quantum sensing. However, fluorescence from the NV− centers suffers large energy loss at the diamond–air interface. Here, we propose a broadband antireflection coating to enhance the fluorescence intensity by simultaneously reducing the energy loss of the excitation laser and the fluorescence. The reflectance for normal-incidence light decreases from nearly 17% for bared diamond to below 0.33% for coated diamond in the wavelength range 500 nm–800 nm. The reflectance averaged over the fluorescence bandwidth is below 3% for angles of incidence less than 20°. The measured emitted fluorescence for the coated diamond is 1.44 times that of uncoated diamond, corresponding to nearly 20% improvement in the measurement sensitivity. The proposed method is significant for enhancing the signal-to-noise ratio of NV−-based sensors.
- Subjects :
- 010302 applied physics
Materials science
business.industry
Quantum sensor
General Physics and Astronomy
Diamond
02 engineering and technology
engineering.material
021001 nanoscience & nanotechnology
Laser
01 natural sciences
Fluorescence
lcsh:QC1-999
law.invention
Fluorescence intensity
law
0103 physical sciences
Broadband
engineering
Optoelectronics
0210 nano-technology
Nitrogen-vacancy center
business
lcsh:Physics
Excitation
Subjects
Details
- ISSN :
- 21583226
- Volume :
- 10
- Database :
- OpenAIRE
- Journal :
- AIP Advances
- Accession number :
- edsair.doi.dedup.....dd790cf7303a866faca892b28c226214