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Bazin D.,CNRS Laboratory of Solid State Physics | Bazin D.,University Pierre and Marie Curie | Daudon M.,AP HP
Journal of Physics D: Applied Physics | Year: 2012

Medical treatments and diagnosis now concern concepts, techniques or nanomaterials previously the domain of solid-state physics. Examples of solid-state physics techniques applied to medicine are magnetism, Auger electron spectroscopy, nanometre-scale metallic clusters and synchrotron radiation. Here, we summarize the research into these phenomena to explain the strong interaction between solid-state physics and medicine, with its current tremendous development. © 2012 IOP Publishing Ltd. Source


Sedlmayr N.,CEA Saclay Nuclear Research Center | Aguiar-Hualde J.M.,CEA Saclay Nuclear Research Center | Bena C.,CEA Saclay Nuclear Research Center | Bena C.,CNRS Laboratory of Solid State Physics
Physical Review B - Condensed Matter and Materials Physics | Year: 2015

In this paper, we show that for a range of configurations of inhomogeneous magnetic fields, it is possible to create flat bands of Majorana states localized on the edges of two-dimensional lattices. Majorana bound states have been predicted to exist in both one-dimensional and two-dimensional systems with Rashba spin-orbit coupling, magnetic fields, and placed in proximity to a superconductor. For the proposed systems, we present the topological phase diagrams, and we study the conditions for weak topology which predict the formation of bands of Majorana states. The Majorana bands are demonstrated to be relatively stable with respect to a variety of different perturbations on both square and hexagonal lattices. ©2015 American Physical Society. Source


Wang K.,CNRS Laboratory of Solid State Physics
Optical and Quantum Electronics | Year: 2015

Low-frequency photonic band structures in two-dimensional metallic lattices are investigated through both numerical and tight-binding approaches. The metallic structures, displaying respectively four and six fold rotational symmetries, are constructed upon different sets of adjustable structure units, allowing probing the contribution of different structure configurations to the band formation. We show that the low-frequency band structures can be described in the tight-binding framework, and analyzed in terms of local resonance modes and their mutual correlations. © 2014, Springer Science+Business Media New York. Source


Wang K.,CNRS Laboratory of Solid State Physics
Physical Review B - Condensed Matter and Materials Physics | Year: 2012

We investigate the light wave states in the octagonal and decagonal quasiperiodic metallic structures by considering their respective approximants at different orders. The mechanisms underlying the light wave behaviors are studied in relation to various structure parameters and configurations. We show that the formation of the first passbands, that delimit the photonic band gaps and determine the plasma gaps, involves only the lowest frequency resonance modes inside the fat tiles, and that light localization occurs due to resonances in high symmetry local centers as well as in the fragments of such centers, formed by the skinny tiles. The structure filling rate affects the localized state frequencies relative to the first passbands, as well as the plasma frequency levels, by modulating the frequency levels of the resonance modes and the widths of the passbands. The results of this study can be generalized to other metallic quasiperiodic and related structures. © 2012 American Physical Society. Source


Wang K.,CNRS Laboratory of Solid State Physics
Journal of the Optical Society of America B: Optical Physics | Year: 2014

We study the low frequency photonic band structures in square Mediterranean and hexagonal snowflake metallic structures, both constructed upon two sets of adjustable tiles. The band formation and evolution are comparatively investigated with respect to local resonances and their variations following the modulations of the tile sizes and shapes. We show that the lowest frequency bands are formed by s-like resonance modes sustained by the structure tiles, of which the contributions vary following local structure modulations, and, under certain conditions, the second bands (above the first photonic bandgaps) are formed by p-like modes sustained by the same tiles. The s and p bands can both be described in the framework of a tight-binding model, allowing band structure analyses in terms of relations between local resonance modes and their mutual correlations. In this schema, the plasma gaps and the first photonic bandgaps arise naturally from local structure patterns, which determine both the local resonance conditions and their correlation relations. © 2014 Optical Society of America. Source

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