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Superlattice for photonic band gap opening in monolayers of dielectric spheres
Auteur(s): Vynck Kevin, Cassagne D., Centeno Emmanuel
(Article) Publié:
Optics Express, vol. 14 p.6668-6674 (2006)
Texte intégral en Openaccess :
Ref HAL: hal-00437955_v1
PMID 19516847
DOI: 10.1364/OE.14.006668
WoS: 000239342300010
Exporter : BibTex | endNote
7 Citations
Résumé: Dielectric spheres synthesized for the fabrication of self-organized photonic crystals such as opals offer large opportunities for the design of novel nanophotonic devices. In this paper, we show that a hexagonal superlattice monolayer of dielectric spheres exhibits an even photonic band gap below the light cone for refractive indices higher than 1.93. The use of spheres with refractive index 2.9 and diameter 0.33 mu m tunes the photonic band gap to the telecommunications range (lambda= 1.55 mu m). As a practical example for the use of such a photonic band gap, we demonstrate the possibility of waveguiding light linearly through the monolayer. (c) 2006 Optical Society of America.
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Linear waveguides in photonic crystals based on periodic arrangement of spheres - art. no. 618226
Auteur(s): Vynck Kevin, Cassagne D., Centeno Emmanuel
Conference: Conference on Photonic Crystal Materials and Devices III (i.e.V) (Strasbourg (FRANCE), FR, 2006-04-03)
Actes de conférence: Photonic Crystal Materials and Devices III (i.e. V), vol. 6182 p.18226-18226 (2006)
Ref HAL: hal-00437956_v1
Exporter : BibTex | endNote
Résumé: We demonstrate the possibility of waveguiding electromagnetic waves in a monolayer of dielectric spheres. While light is confined vertically by index guiding, a triangular superlattice monolayer of spheres was found to exhibit a photonic band gap below the light cone, thereby preventing light from propagating laterally. A gap map of this structure is presented. We propose a possible waveguide configuration that yields two non-degenerate defect modes lying within the photonic band gap. Such a structure may be particularly interesting for coupling light into self-assembled colloidal photonic crystals.
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Optical mirage in graded photonic crystals - art. no. 61821H
Auteur(s): Centeno Emmanuel, Cassagne D., Albert Jean-paul
Conference: Conference on Photonic Crystal Materials and Devices III (i.e.V) (Strasbourg (FRANCE), FR, 2006-04-03)
Actes de conférence: Photonic Crystal Materials and Devices III (i.e. V), vol. 6182 p.H1821-H1821 (2006)
Ref HAL: hal-00437957_v1
Exporter : BibTex | endNote
Résumé: We present the concept of graded photonic crystals (GPC) and show its ability to enhance the control of light propagation. It is shown that gradual modifications of photonic crystal parameters are able to curve the path of light. This light bending which depends on the wavelength and on the incident angle is examined through parametric studies of the iso-frequency curves. We demonstrate that photonic mirages originate from the same physical principles as the usual atmospheric mirages. Two optical components based on two-dimensional GPCs presenting a super bending effect and a large beam shifting are presented.
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Mirage and superbending effect in two-dimensional graded photonic crystals
Auteur(s): Centeno Emmanuel, Cassagne D., Albert Jean-paul
(Article) Publié:
Physical Review B, vol. 73 p.235119 (2006)
Ref HAL: hal-00437540_v1
DOI: 10.1103/PhysRevB.73.235119
WoS: 000238696600047
Exporter : BibTex | endNote
99 Citations
Résumé: We present a study of graded photonic crystals presenting a mirage effect. This light bending is understood through parametric studies of the isofrequency curves. We derive a model based on the effective index computation and on the Eikonal equation in order to demonstrate that photonic mirages originate from the same physical principles as atmospheric mirages. A graded photonic crystal presenting a superbending effect is proposed for designing a bent waveguide.
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Highly tunable waveguides and bends based on graded photonic crystals
Auteur(s): Centeno Emmanuel, Vynck Kevin, Cassagne D.
Conference: OSA Conference "Integrated Photonics Research and Applications Topical Meeting (IPRA)" & "Nanophotonics Topical Meeting (NANO)" (Uncastville, US, 2006-04-26)
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Disorder-induced modification of the transmission of light through two-dimensional photonic crystals
Auteur(s): Beggs Dm, Kaliteevski Ma, Abram Ra, Cassagne D., Albert Jean-paul
(Article) Publié:
Journal Of Physics: Condensed Matter, vol. 17 p.1781-1790 (2005)
Ref HAL: hal-00437958_v1
DOI: 10.1088/0953-8984/17/12/002
WoS: 000228616700006
Exporter : BibTex | endNote
10 Citations
Résumé: Disordered two-dimensional photonic crystals with a complete photonic band-gap have been investigated. Transmission and reflection spectra have been modelled for both ballistic and scattered light. The density of states and electromagnetic field profiles of disorder-induced localized states have also been calculated, for various levels of disorder. It is found that there is a threshold-like behaviour in the amount of disorder. Below the threshold, it is seen that there is a vanishing probability of disorder-induced localized states being introduced into the centre of the photonic band-gap, but that edge-states narrow the band-gap. Above the threshold, there is a non-zero probability of disorder-induced localized states throughout the photonic band-gap, and the modification of the transmission and reflection spectra due to disorder rapidly increases with increasing disorder.
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Disorder induced modification of reflection and transmission spectra of a two-dimensional photonic crystal with an incomplete band-gap
Auteur(s): Beggs Dm, Kaliteevski Ma, Brand S., Abram Ra, Cassagne D., Albert Jean-paul
(Article) Publié:
Journal Of Physics: Condensed Matter, vol. 17 p.4049-4055 (2005)
Ref HAL: hal-00437959_v1
DOI: 10.1088/0953-8984/17/26/005
WoS: 000231847900007
Exporter : BibTex | endNote
9 Citations
Résumé: Transmission and reflection of light in disordered two-dimensional photonic crystals with an incomplete photonic band-gap have been modelled for various levels of disorder. It is found that ballistic and scattered light display different behaviours as a function of the disorder parameter. For ballistic light, the dependence of the transmission coefficient on the disorder parameter exhibits a threshold-like behaviour, whereas the transmission of scattered light increases rapidly for small disorder. Unlike for photonic crystals with a complete bandgap, the minimum of the transmission for scattered light does not coincide with the centre of the photonic band-gap, and Fabry-Perot-type oscillations can be seen within the photonic band-gap.
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