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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)

- G Armelles, A Cebollada, +5 authors L S Froufe-Pérez
- Optics express
- 2013

We show that the interaction between a plasmonic and a magnetoplasmonic metallic nanodisk leads to the appearance of magneto-optical activity in the purely plasmonic disk induced by the magnetoplasmonic one. Moreover, at specific wavelengths the interaction cancels the net electromagnetic field at the magnetoplasmonic component, strongly reducing the… (More)

- R Paniagua-Domínguez, D R Abujetas, L S Froufe-Pérez, J J Sáenz, J A Sánchez-Gil
- Optics express
- 2013

Metallic nanowires (NW) coated with a high permittivity dielectric are proposed as means to strongly reduce the light scattering of the conducting NW, rendering them transparent at infrared wavelengths of interest in telecommunications. Based on a simple, universal law derived from electrostatics arguments, we find appropriate parameters to reduce the… (More)

Atoms can scatter light and they can also amplify it by stimulated emission. From this simple starting point, we examine the possibility of realizing a random laser in a cloud of laser-cooled atoms. The answer is not obvious as both processes (elastic scattering and stimulated emission) seem to exclude one another: pumping atoms to make them behave as an… (More)

- L. S. Froufe-Pérez, P. García-Mochales, P. A. Serena, P. A. Mello, J. J. Sáenz
- Microelectronics Journal
- 2002

A detailed analysis of the distribution of conductances P(g) of quasi-one-dimensional disordered wires in the metal-insulator crossover is presented. P(g) obtained from a Monte Carlo solution of the Dorokhov, Mello, Pereyra, and Kumar (DMPK) scaling equation is in full agreement with "tight-binding" numerical calculations of bulk disordered wires.… (More)

- N. de Sousa, L. S. Froufe-Pérez, J. J. Sáenz, A. García-Martín
- Scientific reports
- 2016

The magneto-optical activity, namely the polarization conversion capabilities of high-index, non-absorbing, core-shell dielectric nanospheres is theoretically analyzed. We show that, in analogy with their plasmonic counterparts, the polarization conversion in resonant dielectric particles is linked to the amount of electromagnetic field probing the… (More)

- Georges Brügger, Luis S. Froufe-Pérez, Frank Scheffold, Juan José Sáenz
- Nature communications
- 2015

Appropriate combinations of laser beams can be used to trap and manipulate small particles with optical tweezers as well as to induce significant optical binding forces between particles. These interaction forces are usually strongly anisotropic depending on the interference landscape of the external fields. This is in contrast with the familiar isotropic,… (More)

The statistical theory of certain complex wave interference phenomena, like the statistical fluctuations of transmission and reflection of waves, is of considerable interest in many fields of physics. In this article we shall be mainly interested in those situations where the complexity derives from the quenched randomness of scattering potentials, as in… (More)

- Gabriel Cwilich, Luis S Froufe-Pérez, Juan José Sáenz
- Physical review. E, Statistical, nonlinear, and…
- 2006

Spatial intensity correlations between waves transmitted through random media are analyzed within the framework of the random matrix theory of transport. Assuming that the statistical distribution of transfer matrices is isotropic, we found that the spatial correlation function can be expressed as the sum of three terms, with distinctive spatial… (More)

Carbon nanotube field-effect transistors (CNT-FETs) are being the subject of very intense research as new devices for future electronic applications. This research is motivated by the technical and economic difficulties in further miniaturizing silicon-based transistors with the present fabrication technologies. At present, an important issue is to dispose… (More)

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