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Dive into the research topics where Jonathan Lemaitre is active.

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Featured researches published by Jonathan Lemaitre.


Optics Express | 2016

Optical characterization at 7.7 µm of an integrated platform based on chalcogenide waveguides for sensing applications in the mid-infrared

Aldo Gutierrez-Arroyo; Emeline Baudet; Loïc Bodiou; Jonathan Lemaitre; Isabelle Hardy; François Faijan; Bruno Bureau; Virginie Nazabal; Joël Charrier

A selenide integrated platform working in the mid-infrared was designed, fabricated and optically characterized at 7.7 µm. Ge-Sb-Se multilayered structures were deposited by RF magnetron sputtering. Using i-line photolithography and fluorine-based reactive ion etching, ridge waveguides were processed as Y-junction, spiral and S-shape waveguides. Single-mode optical propagation at 7.7 µm was observed by optical near-field imaging and optical propagation losses of 2.5dB/cm are measured. Limits of detection of 14.2 ppm and 1.6 ppm for methane and nitrous oxide, respectively, could be potentially measured by using this platform as an evanescent field sensor. Hence, these technological, experimental and theoretical results represent a first step towards the development of an integrated optical sensor operating in the mid-infrared wavelength range.


Optical Materials Express | 2016

Selenide sputtered films development for MIR environmental sensor

Emeline Baudet; Aldo Gutierrez; Petr Nemec; Loïc Bodiou; Jonathan Lemaitre; O. De Sagazan; Hervé Lhermitte; Emmanuel Rinnert; Karine Michel; Bruno Bureau; Joël Charrier; Virginie Nazabal

A micro-sensor based on selenide glasses for evanescent wave detection in mid-infrared spectral range was designed and fabricated. Ge-Sb-Se thin films were successfully deposited by radio-frequency magnetron sputtering. In order to characterize them spectroscopic ellipsometry, atomic force microscopy and contact angle measurements were employed to study near and middle infrared refractive index, surface roughness and the wettability, respectively. Selenide sputtered films were micro-patterned by means of reactive ion etching with inductively coupled plasma process enabling single-mode propagation at a wavelength of 7.7 µm for a waveguide width between 8 and 12 µm. Finally, optical waveguide surface was functionalized by deposition of a hydrophobic polymer, which will permit detection of organic molecules in water. Thus, the optical transducer is a ridge waveguide composed by cladding and guiding Ge-Sb-Se sputtered layers exhibiting a tailored refractive index contrast and a polymer layer onto its surface ready for environmental detections in middle infrared.


Proceedings of SPIE | 2014

Micro-resonators based on integrated polymer technology for optical sensing

Pauline Girault; Jonathan Lemaitre; Mohammed Guendouz; Nathalie Lorrain; Luiz Poffo; Michel Gadonna; Dominique Bosc

Research on sensors has experienced a noticeable development over the last decades especially in label free optical biosensors. However, compact sensors without markers for rapid, reliable and inexpensive detection of various substances induce a significant research of new technological solutions. The context of this work is the development of a sensor based on easily integrated and inexpensive micro-resonator (MR) component in integrated optics, highly sensitive and selective mainly in the areas of health and food. In this work, we take advantage of our previous studies on filters based on micro-resonators (MR) to experiment a new couple of polymers in the objective to use MR as a sensing function. MRs have been fabricated by processing SU8 polymer as core and PMATRIFE polymer as cladding layer of the waveguide. The refractive index contrast reaches 0.16 @ 1550 nm. Sub-micronic ring waveguides gaps from 0.5 to 1 μm have been successfully achieved with UV (i-line) photolithography. This work confirms our forecasts, published earlier, about the resolution that can be achieved. First results show a good extinction coefficient of ~17 dB, a quality factor around 104 and a finesse of 12. These results are in concordance with the theoretical study and they allow us to validate our technology with this couple of polymers. Work is going on with others lower cladding materials that will be used to further increase refractive index contrast for sensing applications.


Journal of Applied Physics | 2013

Guided photoluminescence study of Nd-doped silicon rich silicon oxide and silicon rich silicon nitride waveguides

Parastesh Pirasteh; Joël Charrier; Yannick Dumeige; Jean-Louis Doualan; Patrice Camy; Olivier Debieu; Chuan-hui Liang; Larysa Khomenkova; Jonathan Lemaitre; Yann Boucher; Fabrice Gourbilleau

Planar waveguides made of Nd3+-doped silicon rich silicon oxide (SRSO) and silicon rich silicon nitride (SRSN) have been fabricated by reactive magnetron sputtering and characterized with special emphasis on the comparison of the guided photoluminescence (PL) properties of these two matrices. Guided fluorescence excited by top surface pumping at 488 nm on planar waveguides was measured as a function of the distance between the excitation area and the output of the waveguide, as well as a function of the pump power density. The PL intensity increased linearly with pump power without any saturation even at high power. The linear intensity increase of the Nd3+ guided PL under a non-resonant excitation (488 nm) confirms the efficient coupling between either Si-np and rare-earth ions for SRSO or radiative defects and rare earth ions for SRSN. The guided fluorescences at 945 and 1100 nm were observed until 4 mm and 8 mm of the output of the waveguide for Nd3+ doped SRSO and SRSN waveguides, respectively. The gu...


Advanced Device Materials | 2017

Development of an evanescent optical integrated sensor in the mid-infrared for detection of pollution in groundwater or seawater

Emeline Baudet; Aldo Gutierrez-Arroyo; Marion Baillieul; Joël Charrier; Petr Němec; Loïc Bodiou; Jonathan Lemaitre; Emmanuel Rinnert; Karine Michel; Bruno Bureau; Jean-Luc Adam; Virginie Nazabal

Abstract The detection of molecules dissolved in liquid medium can be envisaged by means of an optical integrated sensor operating in middle infrared range. The intended sensor is composed of a cladding and a guiding selenide sputtered layers transparent in middle infrared. Hence, Ge-Sb-Se thin films were selected in view of tailored refractive index contrast, successfully deposited by radio frequency magnetron sputtering and characterized. To maximize the evanescent field at a wavelength of 7.7 µm, a suitable selenide waveguide allowing measuring the optical transmitted power was designed by performing computer simulations based on the effective index method enabling single-mode propagation for a waveguide width between 8 and 12 µm. Selenide sputtered films were micro-patterned using reactive ion etching with inductively coupled plasma process. Finally, optical waveguide surface was functionalized by the deposition of a hydrophobic polymer, which will permit detection of organic molecules in water.


Integrated Optics: Devices, Materials, and Technologies XXII | 2018

Development of integrated platform based on chalcogenides for sensing applications in the mid-infrared

Joël Charrier; Loïc Bodiou; Aldo Gutierrez-Arroyo; Jonathan Lemaitre; Emeline Baudet; Marion Baillieul; Isabelle Hardy; Virginie Nazabal; Karine Michel; Celine Caillaud; Florent Colas; Kada Boukerma; Emmanuel Rinnert; Bruno Bureau

Mid-Infrared (mid-IR) spectral range, spanning from 2 μm to 20 μm, is ideal for chemical sensing using spectroscopy thanks to the presence of vibrational absorption bands of many liquid and gas substances in this wavelength range. Indeed, mid-IR spectroscopy allows simultaneous qualitative and quantitative analysis by, respectively, identifying molecules from their spectral signature and relating the concentrations of different chemical agents to their absorption coefficient according to Beer-Lambert law. In the last years, photonic integrated sensors based on mid-IR spectroscopy have emerged as a cheap, accurate, and compact solution that would enable continuous real-time on-site diagnostics and monitoring of molecular species without the need to collect samples for off-site measurements. Here, we report the design, processing and characterization of a photonic integrated transducer based on selenide ridge waveguides. Evanescent wave detection of chemical substances in liquid phase (isopropyl alcohol, C3H8O, and acetic acid, C2H4O2, both dissolved in cyclohexane) is presented using their absorption at a wavelength of 7.7 μm.


Communications in Physics | 2017

Study of Optimized Coupling Based on Micro-lensed Fibers for Fibers and Photonic Integrated Circuits in the Framework of Telecommunications and Sensing Applications

Sy Dat Le; Enguerran Delcourt; Pauline Girault; Aldo Gutierrez; Paul Azuelos; Nathalie Lorrain; Loïc Bodiou; Luiz Poffo; Jean-Marc Goujon; Yannick Dumeige; Isabelle Hardy; Philippe Rochard; Jonathan Lemaitre; Parastesh Pirasteh; Mohammed Guendouz; Thierry Chartier; Lionel Quetel; Sébastien Claudot; Joël Charrier; Monique Thual

We demonstrate the interest of expanded beam microlenses (around 55 µm of mode field diameter) to relax positioning tolerances and to decrease reflectance in single mode fiber to fiber interconnections . We also point out the interest of micro-lenses of very small mode field diameter (around 2 µm) to improve coupling efficiency in specialty fibers and integrated waveguides for non linear effects based functions and for sensors applications at a wavelength of 1.55 µm.


international conference on transparent optical networks | 2016

Design of rare-earth doped chalcogenide microresonators for biosensing in Mid-IR

Giuseppe Palma; Mario Christian Falconi; F. Starecki; Virginie Nazabal; Loïc Bodiou; Yannick Dumeige; Jonathan Lemaitre; Joël Charrier; F. Prudenzano

In this paper some preliminary results pertaining to the design and fabrication of rare-earth doped chalcogenide microresonators for lasing in mid-infrared (Mid-IR) wavelength range are illustrated. The unique properties of chalcogenide glass and the Whispering Gallery Mode (WGM) resonances make possible to obtain light emission via rare-earth transitions at long wavelengths. As example, a light source based on chalcogenide glass doped with Er3+ is investigated via a home-made numerical model based on the coupled mode theory and solving the rare-earth rate equations. A number of promising applications in different areas such as biology, molecular spectroscopy and environmental monitoring are feasible.


Integrated Photonics Research, Silicon and Nanophotonics | 2017

Chalcogenide waveguide for sensing applications in the mid-infrared

Emeline Baudet; Aldo Guttierrez-Arroyo; Marion Bailleul; Petr Nĕmec; Joël Charrier; Loїc Bodiou; Jonathan Lemaitre; Emmanuel Rinnert; Karine Michel; Florent Colas; Bruno Bureau; Virginie Nazabal


European Materials Research Society - Spring Meeting 2017 (E-MRS 2017 Spring Meeting) | 2017

Integrated racetrack micro-resonator based on porous silicon ridge waveguides for sensing application

Pauline Girault; Paul Azuelos; Nathalie Lorrain; Jonathan Lemaitre; Luiz Poffo; Parastesh Pirasteh; Aldo Gutierrez; Monique Thual; Isabelle Hardy; Loïc Bodiou; Mohammed Guendouz; Joël Charrier

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Christiane Carre

École Normale Supérieure

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