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10 March 2020 Inverse design and demonstration of on-chip laser-driven particle accelerators (Conference Presentation)
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
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Proceedings Volume 11283, Integrated Optics: Devices, Materials, and Technologies XXIV; 1128308 (2020) https://doi.org/10.1117/12.2546237
Event: SPIE OPTO, 2020, San Francisco, California, United States
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.
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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, and Jelena Vuckovic "Inverse design and demonstration of on-chip laser-driven particle accelerators (Conference Presentation)", Proc. SPIE 11283, Integrated Optics: Devices, Materials, and Technologies XXIV, 1128308 (10 March 2020); https://doi.org/10.1117/12.2546237
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KEYWORDS
Particle accelerators
Dielectrics
Pulsed laser operation
Waveguides
Electrons
Femtosecond phenomena
Optical design
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