Related Experiment Video
Updated: Jul 11, 2025
08:19
Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
Published on: March 2, 2016
18.3K
Enhancing Diamond Color Center Fluorescence via Optimized Configurations of Plasmonic Core-Shell Nanoresonator
András Szenes1,2, Dávid Imre Vass1,2, Balázs Bánhelyi2,3
1Department of Optics and Quantum Electronics, University of Szeged, Dóm tér 9, Szeged 6720, Hungary.
ACS Omega
|November 16, 2023
Summary
We optimized silica-metal nanoresonator dimers to boost fluorescence from diamond color centers (NV and SiV). This design enhances both excitation and emission, leading to brighter, directional light.
Area of Science:
- Materials Science
- Nanotechnology
- Quantum Optics
Background:
- Diamond color centers like NV (nitrogen-vacancy) and SiV (silicon-vacancy) are promising for quantum technologies.
- Enhancing their fluorescence is crucial for improving device performance and signal detection.
- Plasmonic nanostructures offer a route to enhance light-matter interactions.
Purpose of the Study:
- To numerically optimize silica-metal core-shell nanoresonator dimer geometries.
- To maximize the fluorescence enhancement of NV and SiV diamond color centers.
- To investigate the role of geometry and asymmetry in plasmonic enhancement.
Main Methods:
- Numerical optimization of core-shell nanoresonator dimer geometries.
- Utilizing hollow spheroid shapes to reduce metal volume and enhance elongation.
- Analyzing the hybridization of composite plasmonic modes for efficient light coupling.
Main Results:
- Optimized dimers sustain plasmonic modes that simultaneously enhance excitation and emission.
- Hollow spheroid configurations combine reduced metal volume with wide tunability.
- Asymmetric configurations provide good enhancement with a trade-off in corrected quantum efficiency.
- Directional fluorescence significantly increased in optimized asymmetric dimers.
Conclusions:
- Silica-metal core-shell nanoresonator dimers are effective for enhancing diamond color center fluorescence.
- Optimized geometries and asymmetry are key to maximizing fluorescence and directional emission.
- This work provides a pathway for designing advanced nanophotonic devices for quantum applications.
