Now showing items 1-3 of 3

    • Dipolar resonances in conductive carbon micro-fibers probed by near-field terahertz spectroscopy 

      Khromova, Irina Upna; Navarro Cía, Miguel Upna; Brener, I.; Reno, J. L.; Ponomarev, A.; Mitrofanov, Oleg (AIP Publishing, 2015)   Artículo / Artikulua  OpenAccess
      We observe dipole resonances in thin conductive carbon micro-fibers by detecting an enhanced electric field in the near-field of a single fiber at terahertz (THz) frequencies. Time-domain analysis of the electric field ...
    • Evanescently fed electromagnetic band-gap horn antennas and arrays 

      Khromova, Irina Upna; Ederra Urzainqui, Íñigo Upna; Teniente Vallinas, Jorge Upna; Gonzalo García, Ramón Upna; Esselle, Karu P. (IEEE, 2012)   Artículo / Artikulua  OpenAccess
      The design of a horn antenna based on electromagnetic band-gap structures (EBGs) and fed by evanescent fields in the containing periodic structure is presented. Such all-dielectric antennas can form compact arrays and ...
    • Tunable beam steering enabled by graphene metamaterials 

      Orazbayev, Bakhtiyar Upna; Beruete Díaz, Miguel Upna; Khromova, Irina Upna (Optical Society of America, 2016)   Artículo / Artikulua  OpenAccess
      We demonstrate tunable mid-infrared (MIR) beam steering devices based on multilayer graphene-dielectric metamaterials. The effective refractive index of such metamaterials can be manipulated by changing the chemical potential ...