Dielectric Laser Accelerators: Designs, Experiments, and Applications

Wootton, Kent; McNeur, Joshua; Leedle, Kenneth J.

doi:10.1142/s179362681630005x

Cited by 34 publications

(16 citation statements)

References 130 publications

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“…This breakthrough is made possible by the advent of advanced nanofabrication techniques [11][12][13][14][15] combined with the fact that dielectric materials may sustain electric fields close to 10 GV/m when illuminated by ultra-fast NIR laser pulses [16][17][18]. High acceleration gradients may allow DLAs to accomplish significant energy gains in very short lengths, which would enable numerous opportunities in fields where compact and low-cost accelerators would be useful, such as medical imaging, radiation therapy, and industrial applications [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

On-Chip Laser-Power Delivery System for Dielectric Laser Accelerators

et al. 2018

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We propose an on-chip optical power delivery system for dielectric laser accelerators based on a fractal 'tree-branch' dielectric waveguide network. This system replaces experimentally demanding free-space manipulations of the driving laser beam with chip-integrated techniques based on precise nano-fabrication, enabling access to orders of magnitude increases in the interaction length and total energy gain for these miniature accelerators. Based on computational modeling, in the relativistic regime, our laser delivery system is estimated to provide 21 keV of energy gain over an acceleration length of 192 µm with a single laser input, corresponding to a 108 MV/m acceleration gradient. The system may achieve 1 MeV of energy gain over a distance less than 1 cm by sequentially illuminating 49 identical structures. These findings are verified by detailed numerical simulation and modeling of the subcomponents and we provide a discussion of the main constraints, challenges, and relevant parameters in regards to on-chip laser coupling for dielectric laser accelerators.

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Section: Introductionmentioning

confidence: 99%

On-Chip Laser-Power Delivery System for Dielectric Laser Accelerators

et al. 2018

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“…[5]) is that nowadays both the ultrashort laser pulse control techniques as well as the nano-fabrication have significantly improved. Summaries of the recent developments can be found in [6] and [7].…”

Section: Introductionmentioning

confidence: 99%

Beam dynamics analysis of dielectric laser acceleration using a fast 6D tracking scheme

Niedermayer¹,

Egenolf²

2017

Phys. Rev. Accel. Beams

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A six-dimensional symplectic tracking approach exploiting the periodicity properties of Dielectric Laser Acceleration (DLA) gratings is presented. The longitudinal kick is obtained from the spatial Fourier harmonics of the laser field within the structure, and the transverse kicks are obtained using the Panofsky-Wenzel theorem. Additionally to the usual, strictly longitudinally periodic gratings, our approach is also applicable to periodicity chirped (sub-relativistic) and tilted (deflection) gratings. In the limit of small kicks and short periods we obtain the 6D Hamiltonian, which allows, for example, to obtain matched beam distributions in DLAs. The scheme is applied to beam and grating parameters similar to recently performed experiments. The paper concludes with an outlook to laser based focusing schemes, which are promising to overcome fundamental interaction length limitations, in order to build an entire microchip-sized laser driven accelerator.

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“…Various dielectric structures for laser-driven particle acceleration have been proposed ( [19,20], and references therein). In 2013, dielectric laser acceleration was shown experimentally, demonstrating phase-synchronous acceleration of charged particles with light fields [21,22].…”

mentioning

confidence: 99%

Generation and Characterization of Attosecond Microbunched Electron Pulse Trains via Dielectric Laser Acceleration

et al. 2019

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Dielectric laser acceleration is a versatile scheme to accelerate and control electrons with the help of femtosecond laser pulses in nanophotonic structures. We demonstrate here the generation of a train of electron pulses with individual pulse durations as short as 270±80 attoseconds(FWHM), measured in an indirect fashion, based on two subsequent dielectric laser interaction regions connected by a free-space electron drift section, all on a single photonic chip. In the first interaction region (the modulator), an energy modulation is imprinted on the electron pulse. During free propagation, this energy modulation evolves into a charge density modulation, which we probe in the second interaction region (the analyzer). These results will lead to new ways of probing ultrafast dynamics in matter and are essential for future laser-based particle accelerators on a photonic chip.

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Dielectric Laser Accelerators: Designs, Experiments, and Applications

Cited by 34 publications

References 130 publications

On-Chip Laser-Power Delivery System for Dielectric Laser Accelerators

On-Chip Laser-Power Delivery System for Dielectric Laser Accelerators

Beam dynamics analysis of dielectric laser acceleration using a fast 6D tracking scheme

Generation and Characterization of Attosecond Microbunched Electron Pulse Trains via Dielectric Laser Acceleration

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