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On-chip integrated laser-driven particle accelerator.

Neil V Sapra1, Ki Youl Yang2, Dries Vercruysse2

  • 1E. L. Ginzton Laboratory, Stanford University, Stanford, CA, USA. nvsapra@stanford.edu.

Science (New York, N.Y.)
|January 4, 2020
PubMed
Summary

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This summary is machine-generated.

Researchers demonstrated a new waveguide-integrated dielectric laser accelerator (DLA). This compact technology achieves significant electron acceleration, paving the way for miniaturized particle accelerators.

Area of Science:

  • Physics
  • Photonics
  • Materials Science

Background:

  • Conventional radio-frequency accelerators are large and expensive, limiting their widespread application.
  • Dielectric laser accelerators (DLAs) offer a miniaturized and cost-effective alternative by using lasers to drive nanostructures.
  • Existing DLA implementations use free-space lasers, hindering scalability and integration.

Purpose of the Study:

  • To experimentally demonstrate a waveguide-integrated dielectric laser accelerator (DLA).
  • To design the DLA using a photonic inverse-design approach for enhanced performance.
  • To assess the acceleration gradient and energy gain achievable with this integrated system.

Main Methods:

  • Designed a waveguide-integrated DLA using a photonic inverse-design methodology.

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  • Experimentally tested the DLA by measuring electron energy spectra.
  • Utilized particle-tracking simulations to analyze and infer acceleration performance.

    • Main Results:

    • Achieved a maximum energy gain of 0.915 kilo-electron volts over a 30-micrometer distance.
    • Inferred an acceleration gradient of 30.5 mega-electron volts per meter.
    • Demonstrated the feasibility of on-chip acceleration for DLA technology.

    Conclusions:

    • The waveguide-integrated DLA represents a significant advancement in accelerator miniaturization.
    • This technology enables compact and scalable particle acceleration solutions.
    • Paves the way for fully integrated mega-electron volt-scale dielectric laser accelerators.