Journal
SCIENCE
Volume 367, Issue 6473, Pages 79-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aay5734
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Funding
- Gordon and Betty Moore Foundation [GBMF4744]
- U.S. Department of Energy, Office of Science [DE-AC02-76SF00515, DE-SC0009914]
- Nano- and Quantum Science and Engineering Postdoctoral Fellowship
- FWO
- European Union [665501]
- Kailath Graduate Fellowship
- National Science Foundation [ECCS-1542152]
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Particle accelerators represent an indispensable tool in science and industry. However, the size and cost of conventional radio-frequency accelerators limit the utility and reach of this technology. Dielectric laser accelerators (DLAs) provide a compact and cost-effective solution to this problem by driving accelerator nanostructures with visible or near-infrared pulsed lasers, resulting in a 104 reduction of scale. Current implementations of DLAs rely on free-space lasers directly incident on the accelerating structures, limiting the scalability and integrability of this technology. We present an experimental demonstration of a waveguide-integrated DLA that was designed using a photonic inverse-design approach. By comparing the measured electron energy spectra with particle-tracking simulations, we infer a maximum energy gain of 0.915 kilo-electron volts over 30 micrometers, corresponding to an acceleration gradient of 30.5 mega-electron volts per meter. On-chip acceleration provides the possibility for a completely integrated mega-electron volt-scale DLA.
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