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Proceedings Paper

Inverse design and demonstration of on-chip laser-driven particle accelerators (Conference Presentation)
Author(s): Neil V. Sapra; Ki Youl Yang; Dries Vercruysse; Kenneth J. Leedle; Dylan S. Black; Robert J. England; Logan Su; Yu Miao; Olav Solgaard; Robert L. Byer; Jelena Vuckovic

Paper Abstract

We present the first demonstration of a waveguide-integrated dielectric laser accelerator. This structure and associated grating coupler are designed using a gradient-based inverse design approach. A waveguide is directly interfaced with an accelerator structure which is patterned with sub-wavelength features to produce near-fields phase-matched to electrons travelling through a 250 nm gap in the structure. We have experimentally demonstrated these waveguide-integrated accelerators by showing acceleration of subrelativistic electrons of initial energy 83.5 keV. We observe a maximum energy modulation of 1.19 keV over 30 μm. These results represent a significant step toward scalable and integrable on-chip dielectric laser accelerators for applications in ultrafast, medical, and high-energy technologies.

Paper Details

Date Published: 10 March 2020
Proc. SPIE 11283, Integrated Optics: Devices, Materials, and Technologies XXIV, 1128308 (10 March 2020); doi: 10.1117/12.2546237
Show Author Affiliations
Neil V. Sapra, Stanford Univ. (United States)
Ki Youl Yang, Stanford Univ. (United States)
Dries Vercruysse, Stanford Univ. (United States)
Kenneth J. Leedle, Stanford Univ. (United States)
Dylan S. Black, Stanford Univ. (United States)
Robert J. England, SLAC National Accelerator Lab. (United States)
Logan Su, Stanford Univ. (United States)
Yu Miao, Stanford Univ. (United States)
Olav Solgaard, Stanford Univ. (United States)
Robert L. Byer, Stanford Univ. (United States)
Jelena Vuckovic, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 11283:
Integrated Optics: Devices, Materials, and Technologies XXIV
Sonia M. García-Blanco; Pavel Cheben, Editor(s)

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