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Self-assembled three-dimensional inverted photonic crystals on a photonic chip 
Auteur(s): Arpianen Sanna, Vynck Kevin, Dekker James, Kapulainen Markku, Khunsin Worawut, Aalto Timo, Mulot Mikael, Kocher-Oberlehrer Gudrun, Zentel Rudolf, Sotomayor Torres Clivia, Cassagne D., Ahopelto Jouni
(Article) Publié:
Physica Status Solidi A, vol. p.1700039 (2017)
Texte intégral en Openaccess : 
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Actes de la 9ème conférence des Technologies de l’Information et de la Communication pour l’Enseignement (TICE 2014)
Auteur(s): Frasson Claude, Labat Jean-Marc, Gandon Fabien, Cassagne D., Jonquet Clement, Cerri Stefano A., Pujas Philippe
Ouvrage: IUT Béziers (2014)
Ref HAL: hal-01187103_v1
Exporter : BibTex | endNote
Résumé: Le cycle de conférence TICE a pour objectif de faire tous les deux ans le point sur les résultats de recherches, les nouvelles applications, les derniers usages, et les retours d’expériences dans le domaine de l’éducation supérieure numérique. Le colloque TICE 2014 est organisé par l’IUT de Beziers, une composante de l’Université Montpellier 2. Cette neuvième édition du colloque TICE sera l’occasion de rassembler à Béziers, du 18 au 20 Novembre 2014, la communauté scientifique et industrielle des TICE autour du thème « Nouvelles pédagogies et sciences et technologies du numérique ».
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Second Harmonic Generation in GaN-based photonic crystals for single molecule investigations
Auteur(s): Coquillat D., Torres Jeremie, d'Yerville Marine Le Vassor, Cassagne D., Teppe F., Diakonova N., Knap W., de La Rue Richard, Bouchoule Sophie, Margeat Emmanuel, Royer Catherine
Conference: GALLIUM NITRIDE MATERIALS AND DEVICES VII (San Francisco (CA), US, 2012-01-23)
Actes de conférence: Proceedings of SPIE, vol. 8262 p.82621R (2012)
Ref HAL: hal-00704334_v1
DOI: 10.1117/12.905593
WoS: 000302556100033
Exporter : BibTex | endNote
Résumé: III-Nitride semiconductors are promising nonlinear materials for optical wavelength conversion. However second harmonic generation in bulk GaN is weak because GaN is strongly dispersive. We show that appropriate photonic crystal patterning in GaN helps to overcome dispersion and provides quasi-phase matching conditions, resulting in substantially increased conversion efficiency obtained in a flexible manner. Enhancement factors of more than five orders of magnitude can be achieved. Use of photonic crystals makes it possible to reduce the effective observation volume, thereby opening new opportunities such as the study of single-molecule dynamics, even in high concentration solutions. We have demonstrated sharp enhancement of the fluorescence of single molecules immobilized on the surface of a GaN photonic crysta,l when the molecules are excited via the resonant second harmonic generation process.
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Light bending and quasi-transparency in metallic graded photonic crystals
Auteur(s): Centeno Emmanuel, Akmansoy Eric, Vynck Kevin, Cassagne D., Lourtioz Jean-Michel
Conference: 8th International Symposium on Photonic and Electromagnetic Crystal Structures (PECS-VIII) (Sydney (AUSTRALIA), FR, 2009-04-05)
Actes de conférence: PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS, vol. 8 p.120-124 (2010)
Ref HAL: hal-00535635_v1
Exporter : BibTex | endNote
Résumé: Graded photonic crystals (GPhCs) have the remarkable ability to bend the path of light on the wavelength scale. A mirage effect has recently been reproduced experimentally in a two-dimensional structure made of metallic rods operating in the microwave regime (Akmansoy et al., 2008 [7]). This paper is intended to provide some theoretical insight onto the optical properties of metallic GPhCs and to report on the existence of a distinct regime of operation, in which light passes through the structure in a weakly curved trajectory. Experimental results are in good agreement with theoretical predictions, thereby further proving the ability of GPhCs to mold the flow of light in different ways at different frequencies. (C) 2009 Elsevier B.V. All rights reserved.
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Theoretical study off all-dielectric rod-type metamaterials: a route towards optical frequencies
Auteur(s): Vynck Kevin, Felbacq D., Centeno Emmanuel, Guizal B., Cassagne D.
Conference: PECS VIII ~ The 8th International Photonic & Electromagnetic Crystal Structures Meeting (Sydney, AU, 2009-04-05)
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Superbending of light based on graded photonic crystals
Auteur(s): Centeno Emmanuel, Akmansoy Eric, Vynck Kevin, Lourtioz Jean-Michel, Cassagne D.
Conference: PECS VIII ~ The 8th International Photonic & Electromagnetic Crystal Structures Meeting (Sydney, AU, 2009-04-05)
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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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