---
res:
  bibo_abstract:
  - "Flatbands have become a cornerstone of contemporary condensed-matter physics\r\nand
    photonics. In electronics, flatbands entail comparable energy bandwidth and\r\nCoulomb
    interaction, leading to correlated phenomena such as the fractional\r\nquantum
    Hall effect and recently those in magic-angle systems. In photonics, they\r\nenable
    properties including slow light1 and lasing2. Notably, flatbands support\r\nsupercollimation—diffractionless
    wavepacket propagation—in both systems3,4.\r\nDespite these intense parallel efforts,
    flatbands have never been shown to affect the\r\ncore interaction between free
    electrons and photons. Their interaction, pivotal for\r\nfree-electron lasers5,
    microscopy and spectroscopy6,7, and particle accelerators8,9,\r\nis, in fact,
    limited by a dimensionality mismatch between localized electrons and\r\nextended
    photons. Here we reveal theoretically that photonic flatbands can overcome\r\nthis
    mismatch and thus remarkably boost their interaction. We design flatband\r\nresonances
    in a silicon-on-insulator photonic crystal slab to control and enhance the\r\nassociated
    free-electron radiation by tuning their trajectory and velocity. We observe\r\nsignatures
    of flatband enhancement, recording a two-order increase from the\r\nconventional
    diffraction-enabled Smith–Purcell radiation. The enhancement enables\r\npolarization
    shaping of free-electron radiation and characterization of photonic\r\nbands through
    electron-beam measurements. Our results support the use of\r\nflatbands as test
    beds for strong light–electron interaction, particularly relevant for\r\nefficient
    and compact free-electron light sources and accelerators.@eng"
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Yi
      foaf_name: Yang, Yi
      foaf_surname: Yang
  - foaf_Person:
      foaf_givenName: Charles
      foaf_name: Roques-Carmes, Charles
      foaf_surname: Roques-Carmes
      foaf_workInfoHomepage: http://www.librecat.org/personId=e2e68fc9-6505-11ef-a541-eb4e72cc3e82
  - foaf_Person:
      foaf_givenName: Steven E.
      foaf_name: Kooi, Steven E.
      foaf_surname: Kooi
  - foaf_Person:
      foaf_givenName: Haoning
      foaf_name: Tang, Haoning
      foaf_surname: Tang
  - foaf_Person:
      foaf_givenName: Justin
      foaf_name: Beroz, Justin
      foaf_surname: Beroz
  - foaf_Person:
      foaf_givenName: Eric
      foaf_name: Mazur, Eric
      foaf_surname: Mazur
  - foaf_Person:
      foaf_givenName: Ido
      foaf_name: Kaminer, Ido
      foaf_surname: Kaminer
  - foaf_Person:
      foaf_givenName: John D.
      foaf_name: Joannopoulos, John D.
      foaf_surname: Joannopoulos
  - foaf_Person:
      foaf_givenName: Marin
      foaf_name: Soljačić, Marin
      foaf_surname: Soljačić
  bibo_doi: 10.1038/s41586-022-05387-5
  bibo_volume: 613
  dct_date: 2023^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/0028-0836
  - http://id.crossref.org/issn/1476-4687
  dct_language: eng
  dct_publisher: Springer Nature@
  dct_title: Photonic flatband resonances for free-electron radiation@
  fabio_hasPubmedId: '36600060'
...