Now showing items 1-5 of 5

    • Enhanced graphene nonlinear response through geometrical plasmon focusing 

      Saavedra, J. R. M.; García de Abajo, F. Javier (AIP, 2018-01-01)
      Article
      Open Access
      We propose a simple approach to couple light into graphene plasmons and focus these excitations at focal spots of a size determined by the plasmon wavelength, thus producing high optical field enhancement that boosts the ...
    • Enhancement of nonlinear optical phenomena by localized resonances 

      Rodríguez Echarri, A.; Cox, Joel D.; Yu, Renwen; García de Abajo, F. Javier (ACS, 2018-01-20)
      Article
      Open Access
      Nonlinear optics at the nanoscale is severely limited by the small departure of available materials from linear behavior. Despite intense efforts placed into overcoming this problem using multiple strategies for enhancing ...
    • Smith-Purcell radiation emission in aperiodic arrays 

      Saavedra, J. R. M.; Castells-Graells, D.; García de Abajo, F. Javier (APS, 2016-07-13)
      Article
      Open Access
      We study the Smith-Purcell light emission produced by electrons moving parallel to linear aperiodic particle arrays. This constitutes a generalization of this type of phenomenon from periodic to aperiodic structures. As ...
    • Structural Coloring of Glass Using Dewetted Nanoparticles and Ultrathin Films of Metals 

      Yu, Renwen; Mazumder, Prantik; Borrelli, Nick F.; Carrilero, Albert; Ghosh, Dhriti S.; Maniyara, Rinu A.; Baker, David; García de Abajo, F. Javier; Pruneri, Valerio (ACS, 2016-04-22)
      Article
      Open Access
      Metal nanoparticles have been used for coloring glass since antiquity. Colors are produced by light scattering and absorption associated with plasmon resonances of the particles. Recently, dewetting at high temperature has ...
    • Ultrafast nonlinear optical response of Dirac fermions in graphene 

      Baudisch, Matthias; Marini, Andrea; Cox, Joel D.; Zhu, Tony; Silva, Francisco; Teichmann, Stephan; Massicotte, Mathieu; Koppens, Frank; Levitov, Leonid S.; García de Abajo, F. Javier; Biegert, Jens (Nature, 2018-03-09)
      Article
      Open Access
      The speed of solid-state electronic devices, determined by the temporal dynamics of charge carriers, could potentially reach unprecedented petahertz frequencies through direct manipulation by optical fields, consisting ...