Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Grégory Barbillon is active.

Publication


Featured researches published by Grégory Barbillon.


Optics Express | 2011

Implementation of PT symmetric devices using plasmonics: principle and applications

Henri Benisty; Aloyse Degiron; Anatole Lupu; André de Lustrac; Sébastien Chénais; Sébastien Forget; Mondher Besbes; Grégory Barbillon; Aurélien Bruyant; Sylvain Blaize; Gilles Lerondel

The so-called PT symmetric devices, which feature ε((-x)) = ε((x))* associated with parity-time symmetry, incorporate both gain and loss and can present a singular eigenvalue behaviour around a critical transition point. The scheme, typically based on co-directional coupled waveguides, is here transposed to the case of variable gain on one arm with fixed losses on the other arm. In this configuration, the scheme exploits the full potential of plasmonics by making a beneficial use of their losses to attain a critical regime that makes switching possible with much lowered gain excursions. Practical implementations are discussed based on existing attempts to elaborate coupled waveguide in plasmonics, and based also on the recently proposed hybrid plasmonics waveguide structure with a small low-index gap, the PIROW (Plasmonic Inverse-Rib Optical Waveguide).


Nanoscale Research Letters | 2014

Soft UV nanoimprint lithography-designed highly sensitive substrates for SERS detection

Maximilien Cottat; Nathalie Lidgi-Guigui; Inga Tijunelyte; Grégory Barbillon; F. Hamouda; Philippe Gogol; Abdelhanin Aassime; J.-M. Lourtioz; B. Bartenlian; Marc Lamy de la Chapelle

AbstractWe report on the use of soft UV nanoimprint lithography (UV-NIL) for the development of reproducible, millimeter-sized, and sensitive substrates for SERS detection. The used geometry for plasmonic nanostructures is the cylinder. Gold nanocylinders (GNCs) showed to be very sensitive and specific sensing surfaces. Indeed, we demonstrated that less than 4 ×106 avidin molecules were detected and contributed to the surface-enhanced Raman scattering (SERS) signal. Thus, the soft UV-NIL technique allows to obtain quickly very sensitive substrates for SERS biosensing on surfaces of 1 mm 2.


Gold Bulletin | 2007

Biological and chemical gold nanosensors based on localized surface plasmon resonance

Grégory Barbillon; Jean-Louis Bijeon; Jérôme Plain; Marc Lamy de la Chapelle; Pierre-Michel Adam; Pascal Royer

In this paper, we discuss the performances of gold nanosensors based on Localized Surface Plasmon Resonance (LSPR) designed by Electron Beam Lithography (EBL) in the context of biological and chemical sensing. We demonstrate the sensitivity of our gold nanosensors by studying the influence of the concentration of 11-mercaptoundecanoic acid (MUA) on the shift of LSPR wavelength. Additionally, to study the selectivity of our nanosensors, the system Biotin/Streptavidin was used to detect very weak concentration of biomolecules. These results represent new steps for applications in chemical research and medical diagnostics.


Optics Express | 2012

Integration of short gold nanoparticles chain on SOI waveguide toward compact integrated bio-sensors

Mickaël Février; Philippe Gogol; Grégory Barbillon; Abdelhanin Aassime; Robert Megy; B. Bartenlian; J.-M. Lourtioz; B. Dagens

We demonstrate the integration of short metal nanoparticle chains (L ≈700 nm) supporting localized surface plasmons in Silicon On Insulator (SOI) waveguides at telecom wavelengths. Nanoparticles are deposited on the waveguide top and excited through the evanescent field of the TE waveguide modes. Finite difference time domain calculations and waveguide transmission measurements reveal that almost all the TE mode energy can be transferred to nanoparticle chains at resonance. It is also shown that the transmission spectrum is very sensitive to the molecular environment of nanoparticles, thus opening the way towards ultra-compact sensors in guided plasmonics on SOI. An experimental demonstration is reported with octadecanthiol molecules for a detection volume as small as 0.26 attoliter.


Micromachines | 2012

Plasmonic Nanostructures Prepared by Soft UV Nanoimprint Lithography and Their Application in Biological Sensing

Grégory Barbillon

We prepared high-density plasmonic nanostructures on a glass substrate. By using soft UV nanoimprint lithography, gold nanodisks with a diameter of 65 nm were obtained on an area of 1 mm2. We tested these gold nanosensors in the biotin/streptavidin system to study their selectivity and sensitivity of detection. The prepared gold nanodisks could detect streptavidin at 10 pM.


Nanotechnology | 2008

How nanoparticles encapsulating fluorophores allow a double detection of biomolecules by localized surface plasmon resonance and luminescence

Grégory Barbillon; A. C. Faure; N. El Kork; P. Moretti; S. Roux; Olivier Tillement; Meigui Ou; Armel Descamps; Pascal Perriat; A. Vial; Jean-Louis Bijeon; Christophe A. Marquette; B. Jacquier

The paper shows how polysiloxane particles encapsulating fluorophores can be successfully used to detect biotin-streptavidin binding by two types of technique. After functionalization of the particles by streptavidin, the fixation of the biomolecule can indeed be detected by a shift of the localized surface plasmon resonance of the biotinylated gold dots used as substrate and by the luminescence of the fluorophores evidenced by scanning near-field optical microscopy. The development of particles allowing such a double detection opens a route for increasing the reliability of biological detection and for multi-labelling strategies crossing both detection principles.


Journal of Microscopy | 2008

Detection in near-field domain of biomolecules adsorbed on a single metallic nanoparticle

Grégory Barbillon; Jean-Louis Bijeon; J.‐S. Bouillard; Jérôme Plain; M. Lamy de la Chapelle; Pierre-Michel Adam; Pascal Royer

In this paper, we study the performances of nanosensors based on Localized Surface Plasmon Resonance in the context of biological sensing. We demonstrate the sensitivity and the selectivity of our designed nanosensors by studying the influence of the concentration of Streptavidin on the shift of Localized Surface Plasmon Resonance wavelength. In addition, to study the detection of biomolecules on a single Au nanoparticle, we used a Scanning Near‐field Optical Microscope. These results represent new steps for applications in biological research and medical diagnostics.


Nanotechnology | 2016

Directional surface enhanced Raman scattering on gold nano-gratings

Raymond Gillibert; Mitradeep Sarkar; Jean-François Bryche; Ryohei Yasukuni; Ju lien Moreau; Mondher Besbes; Grégory Barbillon; B. Bartenlian; Michael Canva; Marc Lamy de la Chapelle

Directional plasmon excitation and surface enhanced Raman scattering (SERS) emission were demonstrated for 1D and 2D gold nanostructure arrays deposited on a flat gold layer. The extinction spectrum of both arrays exhibits intense resonance bands that are redshifted when the incident angle is increased. Systematic extinction analysis of different grating periods revealed that this band can be assigned to a propagated surface plasmon of the flat gold surface that fulfills the Bragg condition of the arrays (Bragg mode). Directional SERS measurements demonstrated that the SERS intensity can be improved by one order of magnitude when the Bragg mode positions are matched with either the excitation or the Raman wavelengths. Hybridized numerical calculations with the finite element method and Fourier modal method also proved the presence of the Bragg mode plasmon and illustrated that the enhanced electric field of the Bragg mode is particularly localized on the nanostructures regardless of their size.


Journal of Materials Chemistry C | 2017

Study of Au coated ZnO nanoarrays for surface enhanced Raman scattering chemical sensing

Grégory Barbillon; V. E. Sandana; Christophe Humbert; Benoît Bélier; David J. Rogers; Ferechteh H. Teherani; Philippe Bove; Ryan McClintock; Manijeh Razeghi

Eight 1 cm2 samples of self-organising zinc oxide (ZnO) nanopillar arrays with preferential vertical orientation were grown by pulsed laser deposition and then coated with 30 nm of Au using either thermal or electron-beam evaporation. Each sample had a different set of ZnO and Au growth conditions. The Au/ZnO nanoarrays were then tested for use in surface enhanced Raman scattering (SERS) detection of thiophenol molecules. The ratio of ISERS/IRaman was adopted as a measure of the SERS sensitivity and was found to vary from 1.7 to 23.7 within the 8 samples. The impact of the density, width, filling factor, orientation, homogeneity and shape of the nanostructures on the average SERS intensity and the within-wafer reproducibility of the SERS response were considered for 9 paired comparisons based on fixing all but one of the growth parameters for each pairing. Overall, smaller nanopillar width was found to correlate with stronger average SERS signal while more vertically aligned arrays with higher filling factors showed better within-wafer reproducibility.


Nanotechnology | 2008

Core/shell nanoparticles for multiple biological detection with enhanced sensitivity and kinetics

Anne-Charlotte Faure; Grégory Barbillon; Meigui Ou; Gilles Ledoux; Olivier Tillement; Stéphane Roux; Damien Fabrègue; Armel Descamps; Jean-Louis Bijeon; Christophe A. Marquette; Claire Billotey; Cécile Jamois; Taha Benyatou; Pascal Perriat

The paper shows the different methods to attach a molecule to detect streptavidin to a dielectric particle made of a rare-earth oxide core and a polysiloxane shell containing fluorescein. First, the detection of streptavidin binding on a biotinylated gold substrate can be achieved in three ways: the shift of the surface plasmon resonance of the substrate and the double luminescence (organic and inorganic) of the core/shell particle. Second, these detections are efficient even after elimination upon thermal annealing of all the undesired molecules that skew the assays. Finally, the particle that ballasts the protein enhances its binding kinetics and increases the localized surface plasmon resonance shift that detects the binding.

Collaboration


Dive into the Grégory Barbillon's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Jean-Louis Bijeon

Centre national de la recherche scientifique

View shared research outputs
Top Co-Authors

Avatar

Julien Moreau

Centre national de la recherche scientifique

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Philippe Gogol

Centre national de la recherche scientifique

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar

F. Hamouda

University of Paris-Sud

View shared research outputs
Top Co-Authors

Avatar

Jérôme Plain

Centre national de la recherche scientifique

View shared research outputs
Top Co-Authors

Avatar

Michael Canva

Centre national de la recherche scientifique

View shared research outputs
Researchain Logo
Decentralizing Knowledge