Enhanced optical absorption and electric field resonance in diabolo metal bar optical antennas.

PAPER pubmed Optics express 2013 Engineering / measurement Effect: unclear Evidence: Insufficient

Read original paper → DOI: 10.1364/oe.21.032491 PMID: 24514842 Evidence Lab

Abstract

Resonance behaviors of the fundamental resonance mode of diabolo metal bar optical antennas are investigated by using finite-difference time-domain (FDTD) numerical simulations and a dipole oscillator model. It is found that as the waist of the diabolo metal bar optical antenna is reduced, optical energy absorption cross section and near field enhancement at resonance increase significantly. Also reduction of the diabolo waist width causes red-shift of the resonant wavelengths in the spectra of absorption cross-section, scattering cross-section, and the near electric field. A dipole oscillator model including the self-inductance force is used to fit the FDTD numerical simulation results. The dipole oscillator model characterizes well the resonance behaviors of narrow waist diabolo metal bar optical antennas.

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

Using FDTD simulations and a dipole oscillator model, reducing the waist width of a diabolo metal bar optical antenna increased the optical absorption cross section and near-field enhancement at resonance. Waist reduction also caused a red-shift in resonant wavelengths in absorption, scattering, and near electric field spectra; a dipole oscillator model including self-inductance fit the simulation results for narrow-waist antennas.

Outcomes measured

optical energy absorption cross section
near-field enhancement
resonant wavelength shift (red-shift)
scattering cross section
near electric field resonance behavior

Limitations

Study is based on numerical simulations and modeling (FDTD and dipole oscillator model); no experimental validation described in the abstract.
No biological/health outcomes or exposure metrics (e.g., frequency, SAR) are provided in the abstract.

View raw extracted JSON

{
    "study_type": "engineering",
    "exposure": {
        "band": null,
        "source": null,
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": null
    },
    "population": null,
    "sample_size": null,
    "outcomes": [
        "optical energy absorption cross section",
        "near-field enhancement",
        "resonant wavelength shift (red-shift)",
        "scattering cross section",
        "near electric field resonance behavior"
    ],
    "main_findings": "Using FDTD simulations and a dipole oscillator model, reducing the waist width of a diabolo metal bar optical antenna increased the optical absorption cross section and near-field enhancement at resonance. Waist reduction also caused a red-shift in resonant wavelengths in absorption, scattering, and near electric field spectra; a dipole oscillator model including self-inductance fit the simulation results for narrow-waist antennas.",
    "effect_direction": "unclear",
    "limitations": [
        "Study is based on numerical simulations and modeling (FDTD and dipole oscillator model); no experimental validation described in the abstract.",
        "No biological/health outcomes or exposure metrics (e.g., frequency, SAR) are provided in the abstract."
    ],
    "evidence_strength": "insufficient",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "optical antenna",
        "diabolo metal bar",
        "FDTD",
        "dipole oscillator model",
        "near-field enhancement",
        "absorption cross section",
        "scattering cross section",
        "resonance",
        "red-shift",
        "self-inductance"
    ],
    "suggested_hubs": []
}

AI can be wrong. Always verify against the paper.

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.

Comments

No comments yet.