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- A García-Etxarri, R Gómez-Medina, +6 authors J J Sáenz
- Optics express
- 2011

High-permittivity dielectric particles with resonant magnetic properties are being explored as constitutive elements of new metamaterials and devices. Magnetic properties of low-loss dielectric nanoparticles in the visible or infrared are not expected due to intrinsic low refractive index of optical media in these regimes. Here we analyze the dipolar… (More)

- F J García de Abajo, R Gómez-Medina, J J Sáenz
- Physical review. E, Statistical, nonlinear, and…
- 2005

Light transmission through 2D subwavelength hole arrays in perfect-conductor films is shown to be complete (100%) at some resonant wavelengths even for arbitrarily narrow holes. Conversely, the reflection on a 2D planar array of nonabsorbing scatterers is shown to be complete at some wavelengths regardless how small the scatterers are. These results are… (More)

- J M Geffrin, B García-Cámara, +9 authors F Moreno
- Nature communications
- 2012

Magnetodielectric small spheres present unusual electromagnetic scattering features, theoretically predicted a few decades ago. However, achieving such behaviour has remained elusive, due to the non-magnetic character of natural optical materials or the difficulty in obtaining low-loss highly permeable magnetic materials in the gigahertz regime. Here we… (More)

- M Nieto-Vesperinas, J J Sáenz, R Gómez-Medina, L Chantada
- Optics express
- 2010

We present a study of the optical force on a small particle with both electric and magnetic response, immersed in an arbitrary non-absorbing medium, due to a generic incident electromagnetic field. Expressions for the gradient force, radiation pressure and curl components are obtained for the force due to both the electric and magnetic dipoles excited in… (More)

- S Albaladejo, R Gómez-Medina, +6 authors J J Sáenz
- Optics express
- 2010

Radiative corrections to the polarizability tensor of isotropic particles are fundamental to understand the energy balance between absorption and scattering processes. Equivalent radiative corrections for anisotropic particles are not well known. Assuming that the polarization within the particle is uniform, we derived a closed-form expression for the… (More)

- M Nieto-Vesperinas, R Gomez-Medina, J J Saenz
- Journal of the Optical Society of America. A…
- 2011

We show that submicrometer silicon spheres, whose polarizabilities are completely given by their two first Mie coefficients, are an excellent laboratory to test effects of both angle-suppressed and resonant differential scattering cross sections. Specifically, outstanding scattering angular distributions, with zero forward- or backward-scattered intensity,… (More)

- Raquel Gómez-Medina, Marine Laroche, Juan J Sáenz
- Optics express
- 2006

A multiple scattering analysis of the reflectance of a periodic array of sub-wavelength cylinders is presented. The optical properties and their dependence on wavelength, geometrical parameters and cylinder dielectric constant are analytically derived for both s- and p-polarized waves. In absence of Mie resonances and surface (plasmon) modes, and for… (More)

- Braulio García-Cámara, Raquel Gómez-Medina, Juan José Sáenz, Borja Sepúlveda
- Optics express
- 2013

In this work we propose two novel sensing principles of detection that exploit the magnetic dipolar Mie resonance in high-refractive-index dielectric nanospheres. In particular, we theoretically investigate the spectral evolution of the extinction and scattering cross sections of these nanospheres as a function of the refractive index of the external medium… (More)

- R Gómez-Medina, P San José, A García-Martín, M Lester, M Nieto-Vesperinas, J J Sáenz
- Physical review letters
- 2001

A theoretical analysis of electromagnetic forces on neutral particles in a hollow waveguide is presented. We show that the effective scattering cross section of a very small (Rayleigh) particle can be strongly modified inside a waveguide. The coupling of the scattered dipolar field with the waveguide modes induces a resonant enhanced backscattering state of… (More)

- Raquel Gómez-Medina, Juan José Sáenz
- Physical review letters
- 2004

A theoretical analysis of the optically induced interaction between small particles in a quasi-one-dimensional system is presented. The total reflection of light modes near a geometric resonance leads to strong radiation pressure on a single particle. The presence of the two particles splits the resonance leading to a nontrivial oscillating interaction. The… (More)

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