Tunable optical antennas based on metallic nanoshells with nanoknobs.
This engineering study investigates a plasmonic nanostructure composed of a spherical metallic nanoshell with a small metallic nanoparticle (“nanoknob”) on its surface. It reports tunable plasmon resonance behavior driven by nanoshell properties and localized/enhanced electromagnetic fields near the nanoknob under incident light. The work is supported by electromagnetic modeling and near-field optical microscopy, and it also demonstrates an electron-beam method for precise nanoparticle manipulation for fabrication.
Key points
- The structure studied is a metallic nanoshell with a small metallic nanoparticle (“nanoknob”) on its surface.
- Plasmon resonance wavelength is reported to be guided by the nanoshell’s geometrical and material properties.
- Incident-light electromagnetic fields are reported to localize and enhance near the nanoknob.
- Evidence includes electromagnetic modeling and near-field optical microscopy imaging.
- The authors propose and demonstrate a method for precise nanoparticle manipulation under an electron beam.
- The manipulation method is suggested as useful for fabricating plasmonic structures and other nanoscale elements.
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AI-generated summaries may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.
AI-generated summaries may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.
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