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Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
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Boosting Fano resonances in single layered concentric core-shell particles.
Jordi Sancho-Parramon1, Denis Jelovina
1Rudjer Boskovic Institute, Bijenicka cesta 54, Zagreb 10000, Croatia. jsancho@irb.hr.
Nanoscale
|October 1, 2014
Summary
Single-layered core-shell particles can exhibit strong Fano resonances without complex designs. Tailoring materials and illumination enhances these plasmonic resonances, making them robust for various applications.
Area of Science:
- Plasmonics
- Nanophotonics
- Metamaterials
Background:
- Fano resonances in plasmonic systems typically need complex nanostructures and symmetry breaking for efficient excitation.
- Single-layered concentric core-shell particles offer an alternative approach to achieving Fano resonances.
Purpose of the Study:
- To investigate the inherent Fano profiles in single-layered core-shell particles.
- To explore methods for enhancing Fano resonances through material selection and illumination control.
Main Methods:
- Theoretical analysis of scattering spectra in core-shell nanoparticles.
- Investigating the spectral overlap of sphere and cavity modes.
- Exploring weak hybridization effects and material properties.
- Analyzing the impact of retardation effects on resonance order.
- Optimizing illumination conditions to enhance Fano resonances.
Main Results:
- Single-layered core-shell particles exhibit inherent Fano profiles due to spectrally overlapping sphere and cavity modes.
- Weak hybridization and judicious material choice lead to strong electric dipolar Fano resonances.
- Retardation effects can introduce higher multipolar or magnetic-type resonances.
- Tailored illumination conditions can enhance Fano resonances by suppressing unwanted modes.
Conclusions:
- Single-layered core-shell particles serve as effective and robust Fano resonators.
- This geometry simplifies the realization of Fano resonances compared to complex nanostructures.
- The findings offer a pathway for designing advanced plasmonic devices.
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