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17119
05/05/2017

Zero-contrast grating filters for pixelated applications in the Mid-IR range

L.MACE, O.GAUTHIER-LAFAYE, A.MONMAYRANT, H.CAMON, B.PORTIER, F.PRADAL, A.HERVY, H.LEPLAN

PHOTO, Safran Reosc

Rapport LAAS N°17119, Mai 2017, 1p.

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139759
17099
03/05/2017

"Lumière sur la BD" ou comment aborder l'optique, de l'école élémentaire à l'université, par l'analyse de vignettes de bandes dessinées

P.ARGUEL, S.BONNEFONT, J.MATRICON

PHOTO, Maison pour la Science

Manifestation avec acte : Colloque sur l'Enseignement des Technologies et des Sciences de l'Information et des Systèmes ( CETSIS ) 2017 du 03 mai au 04 mai 2017, Le Mans (France), Mai 2017 , N° 17099

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139541
17085
12/04/2017

Vertical integration of an electro-absorption modulator in a VCSEL device

L.MARIGO-LOMBART, A.ARNOULT, C.VIALLON, S.CALVEZ, A.LECESTRE, B.REIG, A.RUMEAU, H.THIENPONT, K.PANAJOTOV, G.ALMUNEAU

PHOTO, TEAM, MOST, I2C, Bruxelles

Rapport LAAS N°17085, Avril 2017, 1p.

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139518
17078
07/04/2017

Design of angularly tolerant zero-contrast grating filters for pixelated filtering in the mid-IR range

L.MACE, O.GAUTHIER-LAFAYE, A.MONMAYRANT, H.CAMON

PHOTO

Revue Scientifique : Journal of the Optical Society of America. A, Optics and image science, Vol.34, N°4, pp.657-665, Avril 2017 , N° 17078

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Plus d'informations

Abstract

Zero-contrast gratings (ZCG) can be used to implement narrow bandpass transmission filters. However, they suffer from poor angular tolerance, which hinders their use in pixelated applications. Combining ZCG with double-corrugation grating, we increase the resonance width and angular tolerance of the filter by more than 1 order of magnitude. Filters tunable around 4.6 μm with more than 90% transmission and compatibility with 140 μm pixel size are demonstrated.

139477
17092
05/04/2017

2x1D crossed gratings for polarization independant tunable transmission filters

A.L.FEHREMBACH, K.SHARSHAVINA, F.LEMARCHAND, E.POPOV, A.MONMAYRANT, P.ARGUEL, O.GAUTHIER-LAFAYE

Fresnel, PHOTO

Manifestation avec acte : International Workshop on Optical Wave & Waveguide Theory and Numerical Modelling ( OWTNM ) 2017 du 05 avril au 06 avril 2017, Eindhoven (Pays-Bas), Avril 2017, 1p. , N° 17092

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139532
17090
05/04/2017

Spectral engineering of the transmission characteristics of racetrack resonators

C.ARLOTTI, O.GAUTHIER-LAFAYE, S.CALVEZ

PHOTO

Manifestation avec acte : International Workshop on Optical Wave & Waveguide Theory and Numerical Modelling ( OWTNM ) 2017 du 05 avril au 06 avril 2017, Eindhoven (Pays-Bas), Avril 2017, 1p. , N° 17090

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139528
17080
05/04/2017

Modelisation of zero contrast grating filters for pixelated applications in the mid-IR range

L.MACE, O.GAUTHIER-LAFAYE, A.MONMAYRANT, H.CAMON, H.LEPLAN, B.PORTIER

PHOTO, Safran Reosc

Manifestation sans acte : International Workshop on Optical Wave & Waveguide Theory and Numerical Modelling ( OWTNM ) 2017 du 05 avril au 06 avril 2017, Eindhoven (Pays-Bas), Avril 2017, 1p. , N° 17080

Diffusable

139499
17014
01/04/2017

Single lithography-step self-aligned fabrication process for Vertical-Cavity Surface-Emitting Lasers

L.MARIGO-LOMBART, A.ARNOULT, L.MAZENQ, P.DUBREUIL, B.REIG, N.MAURAN, H.THIENPONT, K.PANAJOTOV, G.ALMUNEAU

PHOTO, TEAM, I2C, Bruxelles

Revue Scientifique : Materials Science in Semiconductor Processing, Vol.61, pp.35-38, Avril 2017 , N° 17014

Non disponible

Plus d'informations

Abstract

We demonstrate a self-aligned process to fabricate Vertical-Cavity Surface-Emitting Lasers (VCSEL) which combines, within a single lithographic step the mesa etch, the surface passivation, the opening of the emission window and the top annular metallization. This process flow, based on a double photoresist layer enabling two lift-off steps, offers great advantages such as easy and fast implementation while insuring a perfect alignment between the emitting window, the passivation layer aperture and the metal-ring contact. VCSEL fabrication is drastically simplified and its repeatability improved. Finally, this process can be advantageously applied to other photonic devices such waveguide-ridge lasers, modulators, LED, etc.

138793
17030
24/03/2017

Electrically pumped All photonic crystal 2nd order DFB lasers arrays emitting at 2.3 µm

B.ADELIN, O.GAUTHIER-LAFAYE, P.DUBREUIL, A.LECESTRE, Y.ROUILLARD, M.BAHRIZ, G.BOISSIER, A.VICET, A.MONMAYRANT

PHOTO, TEAM, IES

Revue Scientifique : APL photonics, Vol.2, N°3, 036105p., Mars 2017 , N° 17030

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Abstract

Single-mode, widely tunable laser diodes in the mid-infrared range are highly interesting for demanding spectroscopic applications involving multi-species discrimination. We report on an alternative approach using single frequency laser arrays. Single-mode laser arrays were fabricated using all-photonic-crystal electrically pumped distributed feedback cavities on GaSb. The fabricated lasers exhibit thresholds in the 3.2 kA/cm2 range in a continuous wave regime at room temperature. The maximum output power reaches 1 mW and single mode operation with a side-mode suppression ratio of 30 dB is demonstrated. These lasers were used to perform tunable diode laser absorption spectroscopy of several gases in standard gas cells. Continuous spectral coverage of a 40 nm band using 10 lasers seems an achievable goal using laser arrays with PhC lattice constant variations of 1 nm from laser to laser.

139352
17091
01/02/2017

2 × 1D crossed strongly modulated gratings for polarization independent tunable narrowband transmission filters

A.L.FEHREMBACH, K.SHARSHAVINA, F.LEMARCHAND, E.POPOV, A.MONMAYRANT, P.ARGUEL, O.GAUTHIER-LAFAYE

Fresnel, PHOTO

Revue Scientifique : Journal of the Optical Society of America. A, Optics and image science, Vol.34, N°2, pp.234-240, Février 2017 , N° 17091

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Plus d'informations

Abstract

We design a narrowband polarization independent transmission guided mode resonance filter whose center wavelength is tunable with respect to the angle of incidence. The device is composed of two identical structures assembled back to back. Each half structure is a dielectric multilayer stack in which a grating is engraved. This so-called 2×1D crossed gratings component has already been demonstrated for reflection filtering [Opt. Lett. 36, 1662 (2011) [CrossRef] ; Opt. Lett. 39, 6038 (2014) [CrossRef] ]. The functioning in transmission requires the use of a high index material for the grating bumps. For the design, we resort to a clustering global optimization algorithm, used for the first time to our knowledge for grating structures. We demonstrated two filters with a quality factor of about 4000, tunable over more than 15 nm when the angle of incidence varies over a range of 4°, and with a transmittivity at resonance greater than 95% whatever the incident polarization.

139530
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