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6CCVD Research

Enhancing fluorescence excitation and collection from the nitrogen-vacancy center in diamond through a micro-concave mirror

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2018-07-23
JournalApplied Physics Letters
AuthorsDewen Duan, Vinaya Kumar Kavatamane, Sri Ranjini Arumugam, Ganesh Rahane, Yan-Kai Tzeng
InstitutionsNational Institutes for Quantum and Radiological Science and Technology, Max Planck Institute for Biophysical Chemistry
Citations20

Abstract

Section titled ā€œAbstractā€

We experimentally demonstrate a simple and robust optical fiber based method to achieve simultaneously efficient excitation and fluorescence collection from Nitrogen-Vacancy (NV) defects containing micro-crystalline diamond. We fabricate a suitable micro-concave mirror that focuses scattered excitation laser light into the diamond located at the focal point of the mirror. At the same instance, the mirror also couples the fluorescence light exiting out of the diamond crystal in the opposite direction of the optical fiber back into the optical fiber within its light acceptance cone. This part of fluorescence would have been otherwise lost from reaching the detector. Our proof-of-principle demonstration achieves a 25 times improvement in fluorescence collection compared to the case of not using any mirrors. The increase in light collection favors getting high signal-to-noise ratio optically detected magnetic resonance signals and hence offers a practical advantage in fiber-based NV quantum sensors. Additionally, we compacted the NV sensor system by replacing some bulky optical elements in the optical path with a 1 Ɨ 2 fiber optical coupler in our optical system. This reduces the complexity of the system and provides portability and robustness needed for applications like magnetic endoscopy and remote-magnetic sensing.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2015 - Magnetic imaging with an ensemble of nitrogen-vacancy centers in diamond [Crossref]
  2. 2016 - High-resolution magnetic field imaging with a nitrogen-vacancy diamond sensor integrated with a photonic-crystal fiber [Crossref]
  3. 2018 - High-resolution magnetic resonance spectroscopy using a solid-state spin sensor [Crossref]
  4. 2011 - Electric-field sensing using single diamond spins [Crossref]
  5. 2014 - Nanoscale detection of a single fundamental charge in ambient conditions using the nv- center in diamond [Crossref]
  6. 2010 - Temperature dependence of the nitrogen-vacancy magnetic resonance in diamond [Crossref]
  7. 2013 - Nanometre-scale thermometry in a living cell [Crossref]
  8. 2013 - High-precision nanoscale temperature sensing using single defects in diamond [Crossref]
  9. 2015 - Efficient photon collection from a nitrogen vacancy center in a circular bullseye grating [Crossref]
  10. 2018 - Hybrid plasmonic bullseye antennas for efficient photon collection [Crossref]

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