Tunable optical antennas based on metallic nanoshells with nanoknobs.

PAPER pubmed Journal of nanoscience and nanotechnology 2012 Engineering / measurement Effect: unclear Evidence: Insufficient

Read original paper → DOI: 10.1166/jnn.2012.6477 PMID: 23421259 Evidence Lab

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.

AI evidence extraction

At a glance

Study type

Engineering / measurement

Effect direction

unclear

Population

—

Sample size

—

Exposure

Evidence strength

Insufficient

Confidence: 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

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    "study_type": "engineering",
    "exposure": {
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        "source": null,
        "frequency_mhz": null,
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    },
    "population": null,
    "sample_size": null,
    "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": 0.7399999999999999911182158029987476766109466552734375,
    "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/metadata and may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.

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