Recent Submissions

  • Visible Optical Resonances in Electrically Doped DNA 

    Saavedra, J. R. M.; Garcia de Abajo, Francisco Javier (ACS Publications, 2019-02-25)
    Article
    Open Access
    Dexoyribonucleic acid (DNA) has recently been identified as a promising material for nanotechnology due to its unique mechanical, electrical, and optical properties. However, optical applications are severely hampered by ...
  • Single-Plasmon Thermo-Optical Switching in Graphene 

    Cox, Joel D.; Garcia 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. ...
  • Nonlinear Graphene Nanoplasmonics 

    Cox, Joel D.; Garcia 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.; Garcia 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 ...
  • 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 ...
  • 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 ...
  • Transient nonlinear plasmonics in nanostructured graphene 

    COX, JOEL D.; GARCÍA DE ABAJO, F. 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 ...
  • Electron refraction at lateral atomic interfaces 

    Abd El-Fattah, Z. M.; Kher-Elden, M A.; Yassin, O.; El-Okr, M. M.; Ortega, J. E.; García de Abajo, F. J. (AIP, 2017-10-01)
    Article
    Open Access
    We present theoretical simulations of electron refraction at the lateral atomic interface between a “homogeneous” Cu(111) surface and the “nanostructured” one-monolayer (ML) Ag/Cu(111) dislocation lattice. Calculations ...
  • 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 ...
  • Optimization of Nanoparticle-Based SERS Substrates through Large-Scale Realistic Simulations 

    Solís, Diego M.; Taboada, José M,; Obelleiro, Fernando; Liz-Marzán, Luis M.; García de Abajo, Francisco Javier (ACS, 2016-12-20)
    Article
    Open Access
    Surface-enhanced Raman scattering (SERS) has become a widely used spectroscopic technique for chemical identification, providing unbeaten sensitivity down to the singlemolecule level. The amplification of the optical ...
  • 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, 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 ...

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