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Title: Metasurface-based multi-harmonic free-electron light source

Abstract

Metasurfaces are subwavelength spatial variations in geometry and material where the structures are of negligible thickness compared to the wavelength of light and are optimized for far-field applications, such as controlling the wavefronts of electromagnetic waves. Here, we investigate the potential of the metasurface near-field profile, generated by an incident few-cycle pulse laser, to facilitate the generation of high-frequency light from free electrons. In particular, the metasurface near-field contains higher-order spatial harmonics that can be leveraged to generate multiple higher-harmonic X-ray frequency peaks. We show that the X-ray spectral profile can be arbitrarily shaped by controlling the metasurface geometry, the electron energy, and the incidence angle of the laser input. Using ab initio simulations, we predict bright and monoenergetic X-rays, achieving energies of 30 keV (with harmonics spaced by 3 keV) from 5-MeV electrons using 3.4-eV plasmon polaritons on a metasurface with a period of 85 nm. As an example, we present the design of a four-color X-ray source, a potential candidate for tabletop multicolor hard X-ray spectroscopy. Our developments could help pave the way for compact multi-harmonic sources of high-energy photons, which have potential applications in industry, medicine, and the fundamental sciences.

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [3];  [5]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Physics; Univ. of Mons (Belgium). Micro- and Nanophotonic Materials Group
  2. Singapore Inst. of Manufacturing Tech. (Singapore)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Physics
  4. Univ. of Mons (Belgium). Micro- and Nanophotonic Materials Group
  5. Technion-Israel Inst. of Tech., Haifa (Israel). Dept. of Electrical Engineering
Publication Date:
Research Org.:
Krell Inst., Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1510282
Grant/Contract Number:  
FG02-97ER25308
Resource Type:
Accepted Manuscript
Journal Name:
Light, Science & Applications
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2047-7538
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Rosolen, Gilles, Wong, Liang Jie, Rivera, Nicholas, Maes, Bjorn, Soljačić, Marin, and Kaminer, Ido. Metasurface-based multi-harmonic free-electron light source. United States: N. p., 2018. Web. doi:10.1038/s41377-018-0065-2.
Rosolen, Gilles, Wong, Liang Jie, Rivera, Nicholas, Maes, Bjorn, Soljačić, Marin, & Kaminer, Ido. Metasurface-based multi-harmonic free-electron light source. United States. doi:10.1038/s41377-018-0065-2.
Rosolen, Gilles, Wong, Liang Jie, Rivera, Nicholas, Maes, Bjorn, Soljačić, Marin, and Kaminer, Ido. Wed . "Metasurface-based multi-harmonic free-electron light source". United States. doi:10.1038/s41377-018-0065-2. https://www.osti.gov/servlets/purl/1510282.
@article{osti_1510282,
title = {Metasurface-based multi-harmonic free-electron light source},
author = {Rosolen, Gilles and Wong, Liang Jie and Rivera, Nicholas and Maes, Bjorn and Soljačić, Marin and Kaminer, Ido},
abstractNote = {Metasurfaces are subwavelength spatial variations in geometry and material where the structures are of negligible thickness compared to the wavelength of light and are optimized for far-field applications, such as controlling the wavefronts of electromagnetic waves. Here, we investigate the potential of the metasurface near-field profile, generated by an incident few-cycle pulse laser, to facilitate the generation of high-frequency light from free electrons. In particular, the metasurface near-field contains higher-order spatial harmonics that can be leveraged to generate multiple higher-harmonic X-ray frequency peaks. We show that the X-ray spectral profile can be arbitrarily shaped by controlling the metasurface geometry, the electron energy, and the incidence angle of the laser input. Using ab initio simulations, we predict bright and monoenergetic X-rays, achieving energies of 30 keV (with harmonics spaced by 3 keV) from 5-MeV electrons using 3.4-eV plasmon polaritons on a metasurface with a period of 85 nm. As an example, we present the design of a four-color X-ray source, a potential candidate for tabletop multicolor hard X-ray spectroscopy. Our developments could help pave the way for compact multi-harmonic sources of high-energy photons, which have potential applications in industry, medicine, and the fundamental sciences.},
doi = {10.1038/s41377-018-0065-2},
journal = {Light, Science & Applications},
number = 1,
volume = 7,
place = {United States},
year = {2018},
month = {9}
}

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Works referenced in this record:

Optical Constants of the Noble Metals
journal, December 1972


Flat optics with designer metasurfaces
journal, February 2014

  • Yu, Nanfang; Capasso, Federico
  • Nature Materials, Vol. 13, Issue 2, p. 139-150
  • DOI: 10.1038/nmat3839

Dielectric gradient metasurface optical elements
journal, July 2014


Past achievements and future challenges in the development of three-dimensional photonic metamaterials
journal, July 2011