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Showing 1–12 of 12 results
Advanced filters: Author: Boubacar Kanté Clear advanced filters

  • Metamaterials using split-ring resonators can display negative refractive index, yet the same effect for closed rings has remained elusive. Kanté et al.overcome this by using closely spaced coupled nanorings that exploit symmetry breaking to show broadband negative refractive index at optical frequencies.

    • Boubacar Kanté
    • Yong-Shik Park
    • Xiang Zhang
    Research
    Nature Communications
    Volume: 3, P: 1-7

  • Lasing action from an optically pumped bound state in the continuum cavity is demonstrated, of both fundamental interest and with applications from optical trapping to biological sensing and quantum information.

    • Ashok Kodigala
    • Thomas Lepetit
    • Boubacar Kanté
    Research
    Nature
    Volume: 541, P: 196-199

  • The hybridized modes of an asymmetric plasmonic dimer show avoided crossing of both the real and imaginary parts. This can lead to plasmonic exceptional points, which are used for biosensing with very high sensitivity.

    • Jun-Hee Park
    • Abdoulaye Ndao
    • Boubacar Kanté
    Research
    Nature Physics
    Volume: 16, P: 462-468

  • Here the authors demonstrate all-dielectric fishnet-achromatic-metalenses from the visible to the near-infrared region. This metalens performs efficiently independent of polarization over about an octave from 640 nm to 1200 nm.

    • Abdoulaye Ndao
    • Liyi Hsu
    • Boubacar Kanté
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-6

  • I argue that a surface emitting laser that remains single mode irrespective of its size, a scale-invariant laser, should of necessity also waste light at the edge. This is a fundamental departure from the Schawlow-Townes two-mirror strategy that keeps light away from mirrors and edges to preserve gain and minimize loss. The strategy was implemented in the recent discovery of the Berkeley Surface Emitting Laser (BerkSEL).

    • Boubacar Kanté
    Comments & OpinionOpen Access
    Nature Communications
    Volume: 15, P: 1-3

  • Techniques for determining Stokes parameters, which fully define the polarization state of a wave, require multiple measurements, thus potentially leading to inaccuracies. Researchers now show how to simultaneously determine the parameters for visible light using periodic metal structures.

    • Thomas Lepetit
    • Boubacar Kanté
    News & Views
    Nature Photonics
    Volume: 9, P: 709-710

  • The introduction of periodic inversion in the geometry of a plasmonic metasurface markedly boosts the efficiency of nonlinear processes in ultracompact structures.

    • Thomas Lepetit
    • Boubacar Kanté
    News & Views
    Nature Photonics
    Volume: 9, P: 148-150

  • Defect engineering and doping of semiconductors by ion irradiation are essential in large-scale integration of electronic devices. Here, intense ion pulses from a laser-accelerator, with flux levels up to 1022 ions cm-2 s-1, are used to induce and optimize silicon color centers and photon emitters in the telecom band.

    • Walid Redjem
    • Ariel J. Amsellem
    • Thomas Schenkel
    ResearchOpen Access
    Communications Materials
    Volume: 4, P: 1-10