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Subradiant Dipolar Interactions in Plasmonic Nanoring Resonator Array for Integrated Label-Free Biosensing
Yuzhang Liang1, Hui Zhang1, Wenqi Zhu2,3
1National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China.
ACS Sensors
|November 16, 2017
Summary
Researchers developed plasmonic nanoring resonators for highly sensitive, label-free biosensing. These nanostructures overcome limitations of previous sensors, enabling real-time biomolecular detection and integrated photonic biosensing systems.
Area of Science:
- Nanophotonics
- Plasmonics
- Biosensing
Background:
- Plasmonic nanostructures offer potential for label-free biosensing.
- Sensing performance is often limited by broad spectral features and low signal-to-noise ratios due to radiative damping.
Purpose of the Study:
- To investigate plasmonic nanoring resonators for enhanced biosensing performance.
- To overcome limitations of existing nanostructured plasmonic sensors.
Main Methods:
- Fabrication and investigation of plasmonic nanoring resonator arrays.
- Analysis of in-plane and out-of-plane dipolar interactions.
- Experimental demonstration of refractive index sensing and biomolecular binding detection.
Main Results:
- Subradiant lattice plasmon resonance in nanoring arrays shows narrow spectral features and high signal-to-noise ratio.
- Demonstrated high-sensitivity refractive index sensing.
- Achieved real-time monitoring of biomolecular binding at nanomolar concentrations.
Conclusions:
- Plasmonic nanoring resonator arrays are ideal for high-sensitivity chemical and biomedical sensing.
- The technology enables integrated, miniaturized, and label-free remote biosensing platforms.
- These nanostructures show promise for developing advanced photonic biosensing systems.
