J. C. Granada

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Present study shows that the inclusion of single negative polaritonic-like layers in one-dimensional metamaterial photonic superlattices may lead to new effects, such as the simultaneous existence of omnidirectional zero-n¯ and zero-ϕ(eff) non-Bragg gaps for both transversal electric (TE) and transversal magnetic (TM) polarizations, which are also robust to(More)
The electromagnetic propagator associated with the localized collective magnetoplasmon excitations in a semiconductor superlattice with broken translational symmetry, is calculated analytically within linear response theory. We discuss the properties of these collective excitations in both radiative and nonradiative regimes of the electromagnetic spectra.(More)
In the framework of the Ginzburg-Landau (GL) theory in the limit of a GL parameter much larger than unity, we study theoretically the critical behavior of a mesoscopic superconducting ring with negligible width in the presence of a magnetic field applied perpendicularly to the ring plane. It is assumed that the inner ring edge is in contact with a material(More)
The energy spectrum of an electron in a two-dimensional concentric double quantum ring is exactly calculated in the presence of an axial magnetic field using linear combinations of confluent hypergeometric functions. The influence of the geometric confinement on the energy spectrum is analyzed as a function of the inner and outer ring radii. The applied(More)
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