Microsphere-enhanced fluorescence collection for nitrogen vacancy centers in diamond

At a Glance

Metadata	Details
Publication Date	2024-10-21
Journal	Applied Physics Letters
Authors	Shu-Hao Wu, Ignas Lekavicius, Hailin Wang
Institutions	University of Oregon

Abstract

We report experimental studies of microsphere-enhanced fluorescence collection of nitrogen vacancy (NV) centers using silica microspheres with diameters ranging between 15 and 50 μm and employing 20× and 40× objectives with numerical aperture of 0.42 and 0.64, respectively. Photoluminescence-excitation saturation counts as high as 95 kHz have been observed. These studies show that due to the effective collimation of fluorescence by the microsphere, objectives with relatively low numerical aperture (NA) can be used without sacrificing collection enhancement, in agreement with a theoretical model based on Mie scattering. The large enhancement of fluorescence collection with relatively low NA objectives, which feature extralong working distance and are relatively inexpensive, can potentially enable wider use of NV-based quantum sensing in real world applications.

Tech Support

Original Source

DOI: https://doi.org/10.1063/5.0230091

References

2017 - Quantum sensing [Crossref]
2011 - Advances in quantum metrology [Crossref]
2008 - High-sensitivity diamond magnetometer with nanoscale resolution [Crossref]
2011 - Electric-field sensing using single diamond spins [Crossref]
2013 - Nanometre-scale thermometry in a living cell [Crossref]
2014 - Electronic properties and metrology applications of the diamond nv-center under pressure [Crossref]
2010 - Monolithic diamond optics for single photon detection [Crossref]
2014 - Photonic nano-structures on (111)-oriented diamond [Crossref]
2019 - A monolithic immersion metalens for imaging solid-state quantum emitters [Crossref]
2013 - Locomotion of microspheres for super-resolution imaging [Crossref]