Investigation of electric field enhancement between metal blocks at the focused field generated by a radially polarized beam.

Optics express · 2013 · Unclear · Insufficient evidence

← Research stream

UnclearInsufficient evidencePaper 3107

Study snapshot

PublicationOptics express · 2013

Study typeengineering

Reported directionUnclear

Evidence ratingInsufficient

Abstract

A radially polarized beam possesses peculiar focusing properties compared with a linearly polarized beam, for example, the generation of a strong longitudinal field and zero intensity of the Poynting vector on the beam axis. In order to exploit these focusing properties, here we consider a system in which gold metal cubes are arranged along the propagation direction of the beam. An electric field enhancement of more than 20-times can be generated between two gold cubes separated by a distance λ/10 on the optical axis. This is because the energy of a radially polarized beam can propagate even if a metal cube is located on the beam axis, and a longitudinal field generated between the cubes can induce a surface plasmon mode. We show that these results are peculiar properties that cannot be produced with an incident linearly polarized beam. We also show that the beam can generate multiple regions of electrical field enhancement in the propagating direction when multiple metal cubes are arranged on the beam axis.

Machine Enhanced Logic

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

In a system with gold cubes arranged along the propagation direction of a focused radially polarized beam, the electric field between two cubes separated by bb/10 on the optical axis can be enhanced by more than 20-fold. The enhancement is attributed to propagation of the beam energy despite a cube on-axis and to a longitudinal field between cubes inducing a surface plasmon mode; these effects were reported as not achievable with an incident linearly polarized beam. Multiple enhancement regions can be generated when multiple cubes are arranged on the beam axis.

Outcomes measured

electric field enhancement between metal cubes
generation of longitudinal electric field
surface plasmon mode induction
multiple regions of electric field enhancement along propagation direction

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": null,
    "source": "radially polarized beam focused field with gold metal cubes",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "electric field enhancement between metal cubes",
    "generation of longitudinal electric field",
    "surface plasmon mode induction",
    "multiple regions of electric field enhancement along propagation direction"
  ],
  "main_findings": "In a system with gold cubes arranged along the propagation direction of a focused radially polarized beam, the electric field between two cubes separated by \u0003bb/10 on the optical axis can be enhanced by more than 20-fold. The enhancement is attributed to propagation of the beam energy despite a cube on-axis and to a longitudinal field between cubes inducing a surface plasmon mode; these effects were reported as not achievable with an incident linearly polarized beam. Multiple enhancement regions can be generated when multiple cubes are arranged on the beam axis.",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "radially polarized beam",
    "focused field",
    "electric field enhancement",
    "gold cubes",
    "longitudinal field",
    "surface plasmon",
    "Poynting vector",
    "optical axis"
  ],
  "suggested_hubs": []
}

AI can be wrong. Always verify against the paper.

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.21.032217
PubMed: 24514816

Read the original paper →

Related papers

← Back to the Research Library