Directed electron transport through a ballistic quantum dot under microwave radiation.

Physical review letters · 2006 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 6435

Study snapshot

PublicationPhysical review letters · 2006

Study typeother

Reported directionUnclear

Evidence ratingInsufficient

Abstract

Rectification of microwave radiation by asymmetric ballistic dot is studied at different frequencies (1-40 GHz), temperatures, and magnetic fields. Dramatic reduction of the rectification is found in magnetic fields at which the cyclotron radius of electron orbits at the Fermi level is less than the size of the dot. With respect to the magnetic field, both symmetric and antisymmetric contributions to the rectification are presented. The symmetric part changes significantly with microwave frequency omega at omegatau_{f}>/=1, where tau_{f} is the time of the ballistic electron flight across the dot. The results lead consistently towards the ballistic origin of the effect, and can be explained by strongly nonlocal electron response to the microwave electric field, which affects both speed and direction of the electron motion inside the dot.

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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 typeother

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

Exposuremicrowave

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Rectification of microwave radiation by an asymmetric ballistic quantum dot was studied across 1–40 GHz, temperatures, and magnetic fields. Rectification was dramatically reduced in magnetic fields where the cyclotron radius at the Fermi level was smaller than the dot size, and both symmetric and antisymmetric magnetic-field contributions were observed; the symmetric part changed significantly with microwave frequency at ωτ_f ≥ 1.

Outcomes measured

Rectification of microwave radiation in an asymmetric ballistic quantum dot
Magnetic-field dependence of rectification (symmetric and antisymmetric contributions)
Frequency dependence of rectification at ωτ_f ≥ 1

Limitations

No biological/health outcomes described (physics/transport study)
No quantitative exposure metrics (e.g., field strength, power density, SAR) provided in the abstract
Sample size and experimental setup details not provided in the abstract

View raw extracted JSON

{
  "study_type": "other",
  "exposure": {
    "band": "microwave",
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Rectification of microwave radiation in an asymmetric ballistic quantum dot",
    "Magnetic-field dependence of rectification (symmetric and antisymmetric contributions)",
    "Frequency dependence of rectification at ωτ_f ≥ 1"
  ],
  "main_findings": "Rectification of microwave radiation by an asymmetric ballistic quantum dot was studied across 1–40 GHz, temperatures, and magnetic fields. Rectification was dramatically reduced in magnetic fields where the cyclotron radius at the Fermi level was smaller than the dot size, and both symmetric and antisymmetric magnetic-field contributions were observed; the symmetric part changed significantly with microwave frequency at ωτ_f ≥ 1.",
  "effect_direction": "unclear",
  "limitations": [
    "No biological/health outcomes described (physics/transport study)",
    "No quantitative exposure metrics (e.g., field strength, power density, SAR) provided in the abstract",
    "Sample size and experimental setup details not provided in the abstract"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "microwave radiation",
    "ballistic quantum dot",
    "rectification",
    "magnetic field",
    "cyclotron radius",
    "nonlocal electron response",
    "1-40 GHz"
  ],
  "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: 10.1103/physrevlett.97.226807
PubMed: 17155830

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