Tunable optical antennas based on metallic nanoshells with nanoknobs.

Journal of nanoscience and nanotechnology · 2012 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3164

Study snapshot

PublicationJournal of nanoscience and nanotechnology · 2012

Study typeengineering

Reported directionUnclear

Evidence ratingInsufficient

Abstract

We investigate optical properties of a new complex plasmonic nanostructure, which consists of a spherical metallic nanoshell and a small metallic nanoparticle ("nanoknob") situated on its surface. The plasmon resonance wavelength of the entire structure is guided by the geometrical and material properties of the nanoshell whereas the electromagnetic field of the incident light is localized and enhanced near the "nanoknob". The idea is supported with electromagnetic modeling and near-field optical microscopy imaging. In addition, we proposed and demonstrated a new method of nanoparticle precise manipulation under electron beam, which could be used in fabrication of such plasmonic structures and other nanosized elements.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeengineering

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

ExposureNot supplied

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

A plasmonic nanostructure consisting of a metallic nanoshell with a surface nanoparticle (“nanoknob”) showed that resonance wavelength is guided by nanoshell geometry/material, while incident-light fields are localized and enhanced near the nanoknob. The concept was supported by electromagnetic modeling and near-field optical microscopy imaging, and a method for precise nanoparticle manipulation under an electron beam was proposed and demonstrated.

Outcomes measured

Optical/plasmon resonance wavelength tuning in metallic nanoshell–nanoknob structures
Near-field electromagnetic field localization and enhancement near a nanoparticle (nanoknob)
Demonstration of nanoparticle manipulation under an electron beam for fabrication

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
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  },
  "population": null,
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  "outcomes": [
    "Optical/plasmon resonance wavelength tuning in metallic nanoshell–nanoknob structures",
    "Near-field electromagnetic field localization and enhancement near a nanoparticle (nanoknob)",
    "Demonstration of nanoparticle manipulation under an electron beam for fabrication"
  ],
  "main_findings": "A plasmonic nanostructure consisting of a metallic nanoshell with a surface nanoparticle (“nanoknob”) showed that resonance wavelength is guided by nanoshell geometry/material, while incident-light fields are localized and enhanced near the nanoknob. The concept was supported by electromagnetic modeling and near-field optical microscopy imaging, and a method for precise nanoparticle manipulation under an electron beam was proposed and demonstrated.",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "plasmonic nanostructure",
    "metallic nanoshell",
    "nanoknob",
    "plasmon resonance",
    "near-field enhancement",
    "electromagnetic modeling",
    "near-field optical microscopy",
    "electron beam manipulation",
    "optical antenna"
  ],
  "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1166/jnn.2012.6477
PubMed: 23421259

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