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Showing 1–11 of 11 results
Advanced filters: Author: Victor W. Brar Clear advanced filters

  • Graphene’s exotic properties make it suitable for many different optoelectronic devices. Brar et al. show that graphene plasmonic resonators can be exploited to produce narrow spectral emission in the mid-infrared, whose frequency and intensity can be modulated by electrostatic gating.

    • Victor W. Brar
    • Michelle C. Sherrott
    • Harry A. Atwater
    Research
    Nature Communications
    Volume: 6, P: 1-7

  • Graphene-plasmon optical modulators with broadly tunable operating frequencies are sought for photonic applications. Here, Kim et al.demonstrate tunable mid-infrared transmission that utilizes resonant absorption in graphene ribbons to modulate the extraordinary optical transmission effect in metallic slit arrays.

    • Seyoon Kim
    • Min Seok Jang
    • Harry A. Atwater
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-8

  • In metals, the Coulomb potential of charged impurities is strongly screened, but in graphene, the potential charge of a few-atom cluster of cobalt can extend up to 10 nm. By measuring differences in the way electron-like and hole-like Dirac fermions are scattered from this potential, the intrinsic dielectric constant of graphene can be determined.

    • Yang Wang
    • Victor W. Brar
    • Michael F. Crommie
    Research
    Nature Physics
    Volume: 8, P: 653-657

  • Chromosome-level genome assemblies of nine tetraploid and two diploid wild Oryza species provide insights into genome evolution within the genus Oryza and the potential for crop improvement and neodomestication.

    • Alice Fornasiero
    • Tao Feng
    • Rod A. Wing
    ResearchOpen Access
    Nature Genetics
    Volume: 57, P: 1287-1297

  • By varying the voltage on an isolated gate electrode beneath a graphene sheet, the ionization state of cobalt atoms on its surface can be controlled. This enables the electronic structure of individual ionized atoms, and the resulting cloud of screening electrons that form around them, to be obtained with a scanning tunnelling microscope.

    • Victor W. Brar
    • Régis Decker
    • Michael F. Crommie
    Research
    Nature Physics
    Volume: 7, P: 43-47

  • Though active metasurfaces have been attractive for applications requiring control of optical wavefronts, realizing metasurfaces with full phase control remains a challenge. Here, the authors report a metasurface design strategy for enhanced dynamic phase modulation and tunability.

    • Ju Young Kim
    • Juho Park
    • Min Seok Jang
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-8

  • One of the many unusual characteristics of graphene is that it shows ‘puddles’ of positive and negative charge throughout. A systematic scanning tunnelling microscope study shows that these puddles are not a consequence of ripples in graphene’s structure as originally thought, but are due to charged impurities below its surface.

    • Yuanbo Zhang
    • Victor W. Brar
    • Michael F. Crommie
    Research
    Nature Physics
    Volume: 5, P: 722-726