Now showing items 1-11 of 11

    • Electrically tunable nonlinear plasmonics in graphene nanoislands 

      García de Abajo, Francisco Javier; Cox, Joel D. (Nature Publishin group, 2014-12-11)
      Article
      Open Access
      Nonlinear optical processes rely on the intrinsically weak interactions between photons enabled by their coupling with matter. Unfortunately, many applications in nonlinear optics are severely hindered by the small response ...
    • Enhancement of nonlinear optical phenomena by localized resonances 

      Rodríguez Echarri, A.; Cox, Joel D.; Yu, Renwen; García de Abajo, Francisco 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 ...
    • Nonlinear Graphene Nanoplasmonics 

      Cox, Joel D.; García de Abajo, Francisco Javier (ACS, 2019-08-26)
      Article
      Open Access
      Nonlinear optics is limited by the weak nonlinear response of available materials, a problem that is generally circumvented by relying on macroscopic structures in which light propagates over many optical cycles, thus ...
    • Nonlinear Interactions between Free Electrons and Nanographenes 

      Cox, Joel D.; García de Abajo, Francisco Javier (ACS, 2020-05-13)
      Article
      Open Access
      Free electrons act as a source of highly confined, spectrally broad optical fields that are widely used to map photonic modes with nanometer/millielectronvolt space/energy resolution through currently available electron ...
    • Nonlinear plasmonic response in atomically thin metal films 

      Rodríguez Echarri, Álvaro; Cox, Joel D.; Iyikanat, Fadil; García de Abajo, Francisco Javier (De Gruyter, 2021-10-15)
      Article
      Open Access
      Nanoscale nonlinear optics is limited by the inherently weak nonlinear response of conventional materials and the small light–matter interaction volumes available in nanostructures. Plasmonic excitations can alleviate these ...
    • Nonlinear Plasmonic Sensing with Nanographene 

      Yu, Renwen; Cox, Joel D.; García de Abajo, Francisco Javier (APS, 2016-09-16)
      Article
      Open Access
      Plasmons provide excellent sensitivity to detect analyte molecules through their strong interaction with the dielectric environment. Plasmonic sensors based on noble metals are, however, limited by the spectral broadening ...
    • Plasmons in doped finite carbon nanotubes and their interactions with fast electrons and quantum emitters 

      Vega, Sandra de; Cox, Joel D.; García de Abajo, Francisco Javier (APS, 2016-08-31)
      Article
      Open Access
      We study the potential of highly doped finite carbon nanotubes to serve as plasmonic elements that mediate the interaction between quantum emitters. Similar to graphene, nanotubes support intense plasmons that can be ...
    • Quantum effects in the acoustic plasmons of atomically thin heterostructures 

      Rodríguez Echarri, Álvaro; Cox, Joel D.; García de Abajo, Francisco Javier (Optical Society of American (OSA), 2019-05-20)
      Article
      Open Access
      Recent advances in nanofabrication technology now enable unprecedented control over 2D heterostructures, in whichsingle- or few-atom-thick materials with synergetic optoelectronic properties can be combined to ...
    • Single-Plasmon Thermo-Optical Switching in Graphene 

      Cox, Joel D.; García de Abajo, Francisco Javier (ACS Publications, 2019-05-22)
      Article
      Open Access
      While plasmons in noble metal nanostructures enable strong light-matter interactions on commensurate length scales, the overabundance of free electrons in these systems inhibits their tunability by weak external stimuli. ...
    • Transient nonlinear plasmonics in nanostructured graphene 

      Cox, Joel D.; García de Abajo, Francisco Javier (OSA, 2018-04-06)
      Article
      Open Access
      Plasmons in highly doped graphene offer the means to dramatically enhance light absorption in the atomically thin material. Ultimately the absorbed light energy induces an increase in electron temperature, accompanied by ...
    • 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 H. L.; Levitov, Leonid S.; García de Abajo, Francisco 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 ...