Accueil >
Production scientifique
(73) Production(s) de FELBACQ D.


The multipolar hamiltonian to model quantum metamaterialsin the visible range
Auteur(s): Rousseau E., Felbacq D.
Conférence invité: Quantum Metamaterials and Quantum Technology 2016 workshop (Spetses, GR, 20160619)
Ref HAL: hal01337693_v1
Exporter : BibTex  endNote
Résumé: This presentation adresses the question of the correct hamiltonian to describe a quantum metamaterials in the optical frequency range.




Quantum metamaterials in the microwave and optical ranges
Auteur(s): Zagoskin A. m., Felbacq D., Rousseau E.
(Article) Publié:
Epj Quantum Technology, vol. 3 p.2 (2016)
Ref HAL: hal01333403_v1
Ref Arxiv: 1601.06587
DOI: 10.1140/epjqt/s405070160040x
Ref. & Cit.: NASA ADS
Exporter : BibTex  endNote
Résumé: Quantum metamaterials generalize the concept of metamaterials (artificial optical media) to the case when their optical properties are determined by the interplay of quantum effects in the constituent 'artificial atoms' with the electromagnetic field modes in the system. The theoretical investigation of these structures demonstrated that a number of new effects (such as quantum birefringence, strongly nonclassical states of light, etc) are to be expected, prompting the efforts on their fabrication and experimental investigation. Here we provide a summary of the principal features of quantum metamaterials and review the current state of research in this quickly developing field, which bridges quantum optics, quantum condensed matter theory and quantum information processing.



Metamaterials with quantum emitters
Auteur(s): Rousseau E., Cassabois G., Felbacq D.
Conférence invité: Quantum Metamaterials 2015 Workshop (Spetses, GR, 20150601)
Ref HAL: hal01333437_v1
Exporter : BibTex  endNote
Résumé: We present experimental on random metasurfaces coupled to single carbon nanotube and theoretical results on quantum metamaterials.




HOMOGENIZATION NEAR RESONANCES AND ARTIFICIAL MAGNETISM IN 3D DIELECTRIC METAMATERIALS
Auteur(s): Bouchitté Guy, Bourel Christophe, Felbacq D.
(Document sans référence bibliographique) 20151208
Ref HAL: hal01240316_v1
Ref Arxiv: 1512.02463
Ref. & Cit.: NASA ADS
Exporter : BibTex  endNote
Résumé: It is now well established that the homogenization of a periodic array of parallel dielectric fibers with suitably scaled high permittivity can lead to a (possibly) negative frequencydependent effective permeability. However this result based on a twodimensional approach holds merely in the case of linearly polarized magnetic fields, reducing thus its applications to infinite cylindrical obstacles. In this paper we consider a dielectric structure placed in a bounded domain of $\mathbb{R}^3$ and perform a full 3D asymptotic analysis. The main ingredient is a new averaging method for characterizing the bulk effective magnetic field in the vanishingperiod limit. We evidence a vectorial spectral problem on the periodic cell which determines microresonances and encodes the oscillating behavior of the magnetic field from which artificial magnetism arises. At a macroscopic level we deduce an effective permeability tensor that we can be make explicit as a function of the frequency. As far as signchanging permeability are sought after, we may foresee that periodic bulk dielectric inclusions could be an efficient alternative to the very popular metallic splitring structure proposed by Pendry.




Impedance operator description of a meta–surface with electric and magnetic dipoles
Auteur(s): Felbacq D.
(Document sans référence bibliographique)
Ref HAL: hal01182196_v1
Exporter : BibTex  endNote
Résumé: A metasurface made of a collection of nanoresonators characterized an electric dipole and a magnetic dipole was studied in the regime where the wavelength is large with respect to the size of the resonators. An effective description in terms of an impedance operator was derived.
Commentaires: Article invité pour Mathematical Problems in Engineering




Measuring enhanced optical correlations induced by transmission open channels in a slab geometry
Auteur(s): Verrier N., Depreater L, Felbacq D., Gross M.
(Article) Publié:
Physical Review B, vol. 93 p.161114 (2016)
Ref HAL: hal01181347_v2
Ref Arxiv: 1507.08399
DOI: 10.1103/PhysRevB.93.161114
Ref. & Cit.: NASA ADS
Exporter : BibTex  endNote
Résumé: Due to the existence of open channels, light could theoretically be transmitted through disorderedmedia with 100% efficiency. However, because of the large number of channels to be controlledor measured, this has been never observed experimentally. To avoid this difficulty we considerobservables easier to handle experimentally. By measuring the correlations of the field transmittedthrough a disordered medium, we were able to count the number of channels involved in transmissionand to compare this number with theory. For a sample of transmission 1=25, we get a number ofmodes about 15 times smaller than for free space propagation. This figure is in good agreementwith theoretical prediction.




Ray Chaos in a Photonic Crystal
Auteur(s): Rousseau E., Felbacq D.
(Document sans référence bibliographique)
Ref HAL: hal01095319_v1
Ref Arxiv: 1412.4772
Ref. & Cit.: NASA ADS
Exporter : BibTex  endNote
Résumé: The ray dynamics in a photonic crystal was investigated. Chaos occurs for perfectly periodic crystals, the rays dynamics being very sensitive to the initial conditions. Depending on the filling factor, the ray dynamics can exhibit stable paths near (fully) chaotic motion. The degree of chaoticity is quantified through the computation of Lyapunov exponents. It results that the more diluted is the geometry, the more chaotic is the dynamic. Therefore, despite the perfect periodicity of the geometry, light transport is a diffusive process which can be tuned from normal diffusion (brownian motion) to anomalous diffusion because of the existence of Lévy flights.

