R. R. dos Santos

Suppression of Anderson localization of light and Brewster anomalies in disordered superlattices containing a dispersive metamaterial

Light propagation through 1D disordered structures composed of alternating layers, with random thicknesses, of air and a dispersive metamaterial is theoretically investigated. Both normal and oblique incidences are considered. By means of numerical simulations and an analytical theory, we have established that Anderson localization of light may be suppressed: (i) in the long wavelength limit, for a finite angle of incidence which depends on the parameters of the dispersive metamaterial; (ii) for isolated frequencies and for specific angles of incidence, corresponding to Brewster anomalies in both positive- and negative-refraction regimes of the dispersive metamaterial. These results suggest that Anderson localization of light could be explored to control and tune light propagation in disordered metamaterials.

Tuning in magnetic modes in Tb(Co x Ni 1 − x ) 2 B 2 C: From longitudinal spin-density waves to simple ferromagnetism

Neutron diffraction and thermodynamic techniques were used to probe the evolution of the magnetic properties of Tb(Co

Specific Heat Singularity in Two-Dimensional Random Ising Ferromagnets

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Superfluid transition of 4He in fractal media

Ni

Critical exponents for high density and bootstrap percolation

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Magnetic exchange mechanism for electronic gap opening in graphene

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Evolution of magnetic layers stacking sequence within the magnetic structure of Ho(CoxNi1−x)2B2C

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The dilute Ising antiferromagnet in a uniform field on a square lattice

B

The three-dimensional quantum Heisenberg ferromagnet with random anisotropy

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Impurities near an antiferromagnetic-singlet quantum critical point

C. A succession of magnetic modes was observed as