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Title: Terahertz-optical intensity grating for creating high-charge, attosecond electron bunches
Authors: Lim, Jeremy
Chong, Yidong
Wong, Liang Jie
Keywords: DRNTU::Science::Physics
Attosecond Electron Pulse Shaping
Coherent Terahertz Sources
Issue Date: 2019
Source: Lim, J., Chong, Y., & Wong, L. J. (2019). Terahertz-optical intensity grating for creating high-charge, attosecond electron bunches. New Journal of Physics, 21(3), 033020-. doi:10.1088/1367-2630/ab0aa7
Series/Report no.: New Journal of Physics
Abstract: Ultrashort electron bunches are useful for applications like ultrafast imaging, coherent radiation production, and the design of compact electron accelerators. Currently, however, the shortest achievable bunches, at attosecond time scales, have only been realized in the single- or very few-electron regimes, limited by Coulomb repulsion and electron energy spread. Using ab initio simulations and complementary theoretical analysis, we show that highly-charged bunches are achievable by subjecting relativistic (few MeV-scale) electrons to a superposition of terahertz and optical pulses. We provide two detailed examples that use realistic electron bunches and laser pulse parameters which are within the reach of current compact set-ups: one with bunches of >240 electrons contained within 20 as durations and 15 μm radii, and one with final electron bunches of 1 fC contained within sub-400 as durations and 8 μm radii. Our results reveal a route to achieve such extreme combinations of high charge and attosecond pulse durations with existing technology.
DOI: 10.1088/1367-2630/ab0aa7
Rights: © 2019 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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