Top articles

  • The big update

    23 janvier 2015

    With the transfer to the new kiwi platform, Overblog almost killed the blog. The transfer was a real mess and all articles in 2006-2012 period have been lost... I seriously considered shutting down this site and going elsewhere, but at the end, I like...

  • Optimizing Nanoparticle Designs for Ideal Absorption of Light

    03 mars 2015

    Metallic nanoparticles and more recently dielectric nanoparticles are receiving tremendous attention due to their ability to concentrate light energy into volumes at the nanometer scale. Optimizing the absorption of light by suitably designed nanoparticles...

  • Plasmonics and Metamaterials at CLEO Europe EQEC Munich 2015

    09 mars 2015

    The technical program meeting for the CLEO Europe EQEC conference has just been held. For the EH Plasmonics and Metamaterials topic, we will have a total of seven sessions: - Dielectric and hyperbolic metamaterials - Chirality in plasmonics and metamaterials...

  • New article: self-assembled plasmonic nanoparticle dimer antennas

    02 septembre 2015

    Plasmonic antennas have a strong potential to enable monitoring biochemical reactions in nanometer-sized volumes with high sensitivity. However, the difficulty to realize nanometer gap sizes with lithography has restricted the broad use of plasmonic antennas...

  • Conformations of MreB protein interacting with GroEL/ES and TRiC chaperonins

    30 juin 2016

    Chaperonins ensure correct functional folding of proteins in cells. Despite their crucial role, their mechanisms of action are still open to questions. In a recent Scientific Report study “Differential conformational modulations of MreB folding upon interactions...

  • Label-free molecular diagnosis and biosensor: Introducing PhOCCS technology

    06 février 2017

    Label-free molecular biosensors featuring a high sensitivity together a simple manipulation and low operation costs remain a major technological challenge. We introduce a novel technique for high sensitivity specific DNA sensing in a single step homogeneous...

  • FRET enhancement in aluminum nanoapertures

    02 avril 2015

    Metal nanoapertures known as zero-mode waveguides (ZMWs) are receiving a large interest as they concentrate light into nanoscale volumes and enable single molecule fluorescence experiments at micromolar concentrations. Within the large single molecule...

  • ERC Proof of Concept project funded!

    19 mai 2015

    We are glad to report that our proposal PHOCCS has been accepted for funding by ERC Proof of Concept scheme. The project officially starts on May 1st 2015 for 18 months. Abstract: Across Europe, nearly 250,000 people die every year of sepsis, a severe...

  • New article: 3D superlocalization of nanoparticles with subnanometer accuracy

    29 juillet 2015

    Super-resolution microscopy techniques such as PALM/STORM/STED are revolutionizing optical imaging. While diffraction is no longer a limit, another technical barrier arises driven by the need to compensate for mechanical and thermal drifts at the nanoscale....

  • Nanogap optical antennas to enhance FRET

    18 septembre 2015

    Confining light at a spatial scale comparable to the molecular size opens unexplored opportunities to enhance Förster resonance energy transfer (FRET), which is a ubiquitous phenomenon governing the energy exchange at the nanoscale. In a recent Nano Letters...

  • Fluorescence enhancement with double nanohole aperture

    02 novembre 2015

    Plasmonic antennas enable monitoring biochemical reactions in nanometer-sized volumes with high fluorescence brightness. Among the antenna designs, the double nanohole (DNH) is attracting much interest thanks to its distinctive advantages of narrow gaps,...

  • Picosecond lifetimes and high quantum yields in plasmonic dimer antennas

    24 mars 2016

    Coupling single fluorescent emitters to plasmonic resonators is essential in optimizing solid-state light sources. However, the non-scalability of the current approaches remains still a major challenge. In a recent ACS Nano publication, we overcome the...

  • Coupling Emitters and Silver Nanowires for Long-Range Plasmon-Mediated FRET

    31 mars 2016

    Quantum plasmonics and the interaction of quantum emitters with metal nanostructures are receiving a large interest. However, coupling two quantum emitters via a surface plasmon waveguide has remained a major technical challenge. In a recent ACS Nano...

  • Competition between Förster Resonance Energy Transfer and Donor Photodynamics in Plasmonic Dimer Nanoantennas

    22 avril 2016

    Plasmonic nanoantennas provide powerful means to concentrate light into nanoscale dimensions and enhance the fluorescence from single quantum emitters. However, the effects of a resonant plasmonic antenna on Förster resonance energy transfer (FRET) between...

  • All-Dielectric Silicon Nanogap Antennas To Enhance the Fluorescence of Single Molecules

    16 juillet 2016

    Plasmonic optical antennas enhance light-matter interactions at the nanoscale, yet this phenomenon is currently limited by the ohmic losses in the metal. Silicon-based nanophotonics is an appealing alternative approach to implement cost-effective CMOS-compatible...

  • Plasmonic nanoantennas enable forbidden FRET

    16 septembre 2016

    FRET is highly sensitive to the mutual orientation of donor and acceptor dipoles, and can be strongly prohibited for perpendicularly oriented dipoles. However, all previous studies combining FRET with nanophotonics largely overlooked this orientation...

  • Introducing Nanoapertures

    27 décembre 2006 ( #Recent research work )

    My present research is focused on the implementation of nanometric structures to enhance the contrasts (fluorescence, Raman) in optical microscopy. Two goals are aimed: 1- Fundamental Nanophotonics : understand the influence of nanometric structures on...

  • Latest publication : fluorescence cross-correlation spectroscopy in a nanoaperture

    04 janvier 2007 ( #Recent research work )

    Our latest publication has now been released : J. Wenger, D. Gérard, P. -F. Lenne, H. Rigneault, J. Dintinger, T. W. Ebbesen, A. Boned, F. Conchonaud, and D. Marguet, " Dual-color fluorescence cross-correlation spectroscopy in a single nanoaperture :...

  • New article submitted

    11 janvier 2007 ( #Recent research work )

    Aaaarrrrgggghhhhh…. I finally submitted that doomed paper to this high-impact factor physics journal. Took me a too long time to write it down, and to get it into the limited article length :o(( For those interested, here is the abstract : We resolve...

  • Nanophotonics PhD position available !

    01 février 2007 ( #Recent research work )

    I’m looking for a PhD student to start on October 2007 on the topic of nanostructures to enhance optical contrasts in biophotonics. Different fundings are available depending on the candidate’s profile and motivation. Abstract : The ability to producing...

  • Image nanospot cell

    20 février 2007 ( #Recent research work )

    The following image was submitted as cover art for a Biophysical Journal issue (following our paper on cells under the nanospotlight). Unfortunately, the technical staff editors did not accept to consider it : direct cover art suggestions are not welcome....

  • Latest funded project : ANR ANTARES

    17 septembre 2007 ( #Recent research work )

    The 3-years ANTARES project aims at fabricating and characterizing nanostructured substrates for surface enhanced Raman scattering (SERS) and fluorescence emission. The controlled arrangement of the colloidal structure and the use of single crystal colloids...

  • Meet me at…

    28 juin 2007 ( #Recent research work )

    Next conference “Optique Grenoble 2007” (02-05 July) Plenary talk PL4 by Hervé Rigneault : “Structures nanophotoniques pour étudier l'organisation sub-longueur d'onde des biomembranes” Poster P36 by Davy Gérard : “Exaltation de l’émission de fluorescence...

  • Latest publication : photokinetic rates inside nanoapertures

    14 juillet 2007 ( #Recent research work )

    So finally, it got accepted in J. Phys. Chem. C and is now available on the journal homepage following this link. In this paper, we resolve the photokinetics alteration of fluorescent Rh6G molecules diffusing in a water-glycerol mixture within a single...

  • Training periods and PhD positions in optics & biophotonics

    29 octobre 2007 ( #Recent research work )

    The Mosaic group at the Institut Fresnel offers training periods for graduate students in optics and photonics. PhD positions are also available based on the different internship subjects, depending on the applicant’s profile and fundings (read more about...

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