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(96) Production(s) de FELBACQ D.
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All-dielectric rod-type metamaterials at optical frequencies
Auteur(s): Vynck Kevin, Felbacq D., Centeno Emmanuel, Cabuz A., Cassagne D., Guizal B.
(Article) Publié:
Physical Review Letters, vol. 102 p.133901 (2009)
Texte intégral en Openaccess :
Ref HAL: hal-00385881_v1
PMID 19392353
DOI: 10.1103/PhysRevLett.102.133901
WoS: 000264888600019
Exporter : BibTex | endNote
189 Citations
Résumé: Light propagation in all-dielectric rod-type metamaterials is studied theoretically. The electric and magnetic dipole moments of the rods are derived analytically in the long-wavelength limit. The effective permittivity and permeability of a square lattice of rods are calculated by homogenizing the corresponding array of dipoles. The role of dipole resonances in the optical properties of the rod array is interpreted. This structure is found to exhibit a true left-handed behavior, confirming previous experiments [L. Peng et al., Phys. Rev. Lett. 98, 157403 (2007)]. A scaling analysis shows that this effect holds at optical frequencies and can be obtained by using rods made, for example, of silicon.
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What is the direction followed by a beam in a photonic medium?
Auteur(s): Felbacq D., Guizal B.
(Article) Publié:
Optics Letters, vol. 33 p.998-1000 (2008)
Résumé: The direction of propagation followed by a monochromatic beam in a periodic structure is generally deduced from the isofrequency diagram, which is related to the group velocity. However, the group velocity is the derivative of omega with respect to the wavenumber, while the behavior of the beam should depend on omega only. In the subwavelength regime, a method for choosing the relevant branch of the isofrequency diagram and relying on the behavior of the system at omega only is described. (C)d 2008 Optical Society of America.
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Effective properties of membrane photonic crystals - art. no. 70410R
Auteur(s): Felbacq D., Guizal B., Bouchitte Guy
Conference: Conference on Nanostructured Thin Films (San Diego (CA), US, 2008-08-13)
Actes de conférence: NANOSTRUCTURED THIN FILMS, vol. 7041 p.R410-R410 (2008)
Ref HAL: hal-00437972_v1
Exporter : BibTex | endNote
Résumé: Wave propagation in thin nanostructured films in the low frequency regime is studied. By means of a two-scale analysis, it is shown that the medium can be homogenized, i.e. described by effective electromagnetic parameters. The effective permeability and permittivity are obtained by solving a set of partial differential equations. A numerical aproach based on the Fourier Modal Method is proposed in order to solve these equations.
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Second harmonic localization in nonlinear photonic crystals - art. no. 698915
Auteur(s): Centeno Emmanuel, Ciraci Cristian, Felbacq D., Cassagne D.
Conference: Conference on Photonic Crystal Materials and Devices VIII (Strasbourg (FRANCE), FR, 2008-04-08)
Actes de conférence: PHOTONIC CRYSTAL MATERIALS AND DEVICES VIII, vol. 6989 p.98915-98915 (2008)
Ref HAL: hal-00437951_v1
Exporter : BibTex | endNote
Résumé: We demonstrate an isotropic phase matching condition achieved in nonlinear 2D PhCs that suppresses the incident angle constraint [1]. In addition, we show a backward SH localization effect by combining this unusual all-angle phase matching and left-handed PhC properties. The SH emission is confined in a small area of dimension close to the pump wavelength without the introduction of defect lattices. An analytical model is proposed in order to explain this parametric localization mechanism.
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Plasmons go quantum
Auteur(s): Felbacq D.
(Article) Publié:
Journal Of Nanophotonics, vol. 2 p.020302 (2008)
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Spatial dispersion in negative-index composite metamaterials
Auteur(s): Felbacq D., Cabuz A., Cassagne D.
(Article) Publié:
Physical Review A: Atomic, Molecular And Optical Physics, vol. 77 p.013807 (2008)
Ref HAL: hal-00385863_v1
DOI: 10.1103/PhysRevA.77.013807
WoS: 000252862000162
Exporter : BibTex | endNote
54 Citations
Résumé: The metamaterials exhibiting negative permittivity and permeability that have been under numerical and experimental study recently generally operate at frequencies between the homogeneous and heterogeneous regimes, a region characterized by the phenomenon of spatial dispersion. However, since many interesting applications such as the superlens rely on nondispersive homogeneous behavior, one needs a means to diagnose spatial dispersion efficiently as well as to explore in more detail the physics of dispersive media. In this work, we put forward and illustrate the notion of an inhomogeneous effective medium model. We use it to explore the spatial dispersion in negative-index composites, and we show that it is an ideal tool for studying the behavior of composite metamaterials in the intermediate-frequency region where homo- geneous effective medium models become spatially dispersive or nonlocal.
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Onset of a band structure as a result of Mie resonances
Auteur(s): Felbacq D., Guizal B., Bouchitte G.
Conférence invité: Nanophotonics 2008 (Nanjing, CN, 2008-05-26)
Ref HAL: hal-00807764_v1
Exporter : BibTex | endNote
Résumé: On étudie des ensembles de diffuseurs à haut facteur de qualité. La présence de modes internes entraîne l'ouverture de canaux pour la transmission de la lumière.
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