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Atom-Photon Coupling from Nitrogen-vacancy Centres Embedded in Tellurite Microspheres
Yinlan Ruan1, Brant C Gibson2, Desmond W M Lau2
1ARC Centre of Excellence for Nanoscale BioPhotonics, Institute of Photonics and Advanced Sensing, The University of Adelaide, Adelaide, SA 5005, Australia.
Scientific Reports
|June 23, 2015
Summary
We created tellurite microspheres with embedded nanodiamonds for enhanced quantum sensing. This method enables direct coupling of nitrogen-vacancy center fluorescence to optical modes, showing promise for sensitive detection applications.
Area of Science:
- Optics and Photonics
- Materials Science
- Quantum Technology
Background:
- Whispering gallery mode resonators offer high sensitivity for sensing applications.
- Coupling light sources to these modes typically relies on evanescent fields, limiting efficiency.
- Nitrogen-vacancy (NV) centers in nanodiamonds are promising quantum emitters.
Purpose of the Study:
- To develop a novel method for integrating NV-containing nanodiamonds into tellurite microspheres.
- To achieve direct coupling between NV fluorescence and microsphere whispering gallery modes.
- To demonstrate the sensing capabilities of this hybrid system.
Main Methods:
- Fabrication of high-quality tellurite microspheres.
- Embedding nanodiamonds with nitrogen-vacancy (NV) centers within the microspheres.
- Characterization of optical properties and fluorescence coupling at room temperature.
- Demonstration of sensing via surface coating and resonance peak shifting.
Main Results:
- Successful creation of tellurite microspheres with embedded nanodiamonds.
- Direct coupling of NV fluorescence to whispering gallery modes, overcoming evanescent coupling limitations.
- Demonstrated resonance peak shifting upon surface modification, indicating sensing potential.
- Stable performance at room temperature.
Conclusions:
- This hybrid approach provides a robust platform for creating optical cavities.
- The direct coupling mechanism enhances signal detection for quantum and sensing applications.
- The developed tellurite microsphere-nanodiamond system shows significant potential for advanced sensor development.
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