A model for the efficient coupling between intense lasers and subwavelength grating targets

Wang, Weimin; Sheng, Zheng-Ming; Zhang, Jianhua

doi:10.1063/1.2898456

Cited by 48 publications

(45 citation statements)

References 12 publications

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“…At the target rear side the additional wider holes are installed to ensure the proton beam collimation based on our previous study [13] throughout the paper. Thin foil tailored targets, which have a subwavelength structure, enhance the laser energy absorption [21][22][23][24].…”

Section: Efficient Laser Energy Conversion To Ions In Laser Hole-targmentioning

confidence: 99%

“…The energy conversion efficiency from laser to protons tends to be low. The subwavelength-multiholes transpiercing the planar target enhance the laser-proton energy conversion efficiency [21][22][23]. The subwavelength microstructured targets [21][22][23][24][25] are propitious to enhance the laser energy absorption.…”

Section: Introductionmentioning

confidence: 99%

“…The subwavelength-multiholes transpiercing the planar target enhance the laser-proton energy conversion efficiency [21][22][23]. The subwavelength microstructured targets [21][22][23][24][25] are propitious to enhance the laser energy absorption. In this paper a e-mail: kwt@cc.utsunomiya-u.ac.jp This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.…”

Section: Introductionmentioning

confidence: 99%

“…The ion acceleration in the laser-foil interaction is expected to be a new method of ion acceleration. The issues in the laser ion acceleration include ion beam collimation [9,13], ion energy spectrum control, ion production efficiency [21][22][23], etc. In this paper we focus on the energy conversion efficiency from laser to protons in the laser-ion acceleration, and so far the energy conversion efficiency was still relatively low in actual experiments.…”

Section: Introductionmentioning

confidence: 99%

“…The energy of ions, which are accelerated in an interaction between an intense laser pulse and a thin foil target, has been over MeV [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. The ion acceleration in the laser-foil interaction is expected to be a new method of ion acceleration.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Efficient ion generation in laser-foil interaction

Kawata

Takahashi

Satoh

et al. 2013

EPJ Web of Conferences

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Abstract.A remarkable improvement is presented on the energy conversion efficiency from laser to protons in a laser-foil interaction by particle simulations. The total laser-proton energy conversion efficiency from laser to protons becomes 16.7%, though a conventional plane foil target serves a rather low efficiency. In our 2.5-dimensional particle-in-cell simulations the Al multihole structure is also employed, and the laser absorption ratio reaches 71.2%. The main physical reason for the enhancement of the conversion efficiency is a reduction of the laser reflection at the target surface area;

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Section: Efficient Laser Energy Conversion To Ions In Laser Hole-targmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Efficient ion generation in laser-foil interaction

Kawata

Takahashi

Satoh

et al. 2013

EPJ Web of Conferences

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Controllability of intense-laser ion acceleration

Kawata

Takano

Izumiyama

et al. 2014

High Pow Laser Sci Eng

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An ion beam has the unique feature of being able to deposit its main energy inside a human body to kill cancer cells or inside material. However, conventional ion accelerators tend to be huge in size and cost. In this paper, a future intenselaser ion accelerator is discussed to make the laser-based ion accelerator compact and controllable. The issues in the laser ion accelerator include the energy efficiency from the laser to the ions, the ion beam collimation, the ion energy spectrum control, the ion beam bunching, and the ion particle energy control. In the study, each component is designed to control the ion beam quality by particle simulations. The energy efficiency from the laser to ions is improved by using a solid target with a fine sub-wavelength structure or a near-critical-density gas plasma. The ion beam collimation is performed by holes behind the solid target or a multi-layered solid target. The control of the ion energy spectrum and the ion particle energy, and the ion beam bunching are successfully realized by a multi-stage laser-target interaction.

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Enhancement of the surface emission at the fundamental frequency and the transmitted high-order harmonics by pre-structured targets

Pan

Yang

Guo

et al. 2019

High Pow Laser Sci Eng

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Laser interaction with an ultra-thin pre-structured target is investigated with the help of both two-dimensional and three-dimensional particle-in-cell simulations. With the existence of a periodic structure on the target surface, the laser seems to penetrate through the target at its fundamental frequency even if the plasma density of the target is much higher than the laser’s relativistically critical density. The particle-in-cell simulations show that the transmitted laser energy behind the pre-structured target is increased by about two orders of magnitude compared to that behind the flat target. Theoretical analyses show that the transmitted energy behind the pre-structured target is actually re-emitted by electron ‘islands’ formed by the surface plasma waves on the target surfaces. In other words, the radiation with the fundamental frequency is actually ‘surface emission’ on the target rear surface. Besides the intensity of the component with the fundamental frequency, the intensity of the high-order harmonics behind the pre-structured target is also much enhanced compared to that behind the flat target. The enhancement of the high-order harmonics is also related to the surface plasma waves generated on the target surfaces.

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A model for the efficient coupling between intense lasers and subwavelength grating targets

Cited by 48 publications

References 12 publications

Efficient ion generation in laser-foil interaction

Efficient ion generation in laser-foil interaction

Controllability of intense-laser ion acceleration

Enhancement of the surface emission at the fundamental frequency and the transmitted high-order harmonics by pre-structured targets

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