Plasmonic array nanoantennas on layered substrates: modeling and radiation characteristics.

Optics express · 2009 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3326

The paper develops a Green’s-function-based analytical model for plasmonic core-shell nano-radiator arrays above layered substrates and validates it using full-wave FDTD simulations. It reports that array configuration and multilayer substrate tailoring can b…

Study snapshot

PublicationOptics express · 2009

Study typeengineering

Reported directionUnclear

Evidence ratingInsufficient

Abstract

In this paper, we theoretically characterize the performance of array of plasmonic core-shell nano-radiators located over layered substrates. Engineered substrates are investigated to manipulate the radiation performance of nanoantennas. A rigorous analytical approach for the problem in hand is developed by applying Green's function analysis of dipoles located above layered materials. It is illustrated that around the electric scattering resonances of the subwavelength spherical particles, each particle can be viewed as an induced electric dipole which is related to the total electric field upon that particle by a polarizability factor. Utilizing this, we can effectively study the physical performance of such structures. The accuracy of our theoretical model is validated through using a full-wave finite difference time domain (FDTD) numerical technique. It is established that by novel arraying of nano-particl and tailoring their multilayer substrates, one can successfully engineer the radiation patterns and beam angles. Several optical nanoantennas designed on layered substrates are explored. Using the FDTD the effect of finite size substrate is also explored.

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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

Outcomes measured

Radiation performance of plasmonic core-shell nanoantenna arrays on layered substrates
Radiation patterns and beam angles (modeling/engineering outcomes)
Validation of analytical model vs. FDTD simulations
Effect of finite-size substrate on nanoantenna performance

Limitations

The abstract describes theoretical modeling and numerical validation only; no biological/health outcomes are reported.
No specific frequencies, exposure metrics (e.g., SAR), or quantitative performance results 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": [
    "Radiation performance of plasmonic core-shell nanoantenna arrays on layered substrates",
    "Radiation patterns and beam angles (modeling/engineering outcomes)",
    "Validation of analytical model vs. FDTD simulations",
    "Effect of finite-size substrate on nanoantenna performance"
  ],
  "main_findings": "The paper develops a Green’s-function-based analytical model for plasmonic core-shell nano-radiator arrays above layered substrates and validates it using full-wave FDTD simulations. It reports that array configuration and multilayer substrate tailoring can be used to engineer radiation patterns and beam angles, and explores effects of finite-size substrates in FDTD.",
  "effect_direction": "unclear",
  "limitations": [
    "The abstract describes theoretical modeling and numerical validation only; no biological/health outcomes are reported.",
    "No specific frequencies, exposure metrics (e.g., SAR), or quantitative performance results are provided in the abstract."
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "plasmonic nanoantennas",
    "core-shell nanoparticles",
    "layered substrates",
    "Green's function",
    "dipole model",
    "polarizability",
    "FDTD",
    "radiation pattern",
    "beam steering"
  ],
  "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: 10.1364/oe.17.018556
PubMed: 20372586

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