On going

Marie curie fellowship – SMART LANLIGHT

 Starting 09/2016 to 08/2018

The project SMART LANLIGHT will develop a new technique for measuring nearfield optical properties on nanostructures based on the use of a levitating trapped nano-source. We will use -but not limited to- a lanthanide doped particle as the nano-emitter. Specifically, lanthanides are sensitive to both optical electric and magnetic field so that full understanding of the optical near-field properties is achievable, in an unprecedented way. We then plan to employ this new technique for investigating nanolight-matter interactions on technologically important nanostructures such as optical antennas, nanophotonic circuits, metamaterials etc… This new and original probing technique will open the ways to a large variety of applications such as high resolution imaging of nanophotonics components (nano-optical circuiterie, spin domain …) or biological samples but also e.g cancer diagnostic and therapy since lanthanide can be used for tumor cell detection and photodynamic therapy. Image9

Fluorescence in nanotrap project – (ERC ExtendFRET)erc

From 11/2011 to now



Past Research projects

Postdoctoral work at ICFOICFO

From 11/2011 to 10/2015
Plasmonic Nanotweezers:

Plasmonic fields are engineered to design the next generation of optical nanotweezers capable of trapping and manipulating non invasively nanosized objects.

Related publications:

  • [PDF] J. Berthelot, S. S. Acimovic, M. L. Juan, M. P. Kreuzer, J. Renger, and R. Quidant. Three-dimensional manipulation with scanning near-field optical nanotweezers. Nat nano, 9(4):295–299, 2014.
    author = {Berthelot, J. and Acimovic, S. S. and Juan, M. L. and Kreuzer, M.
    P. and Renger, J. and Quidant, R.},
    title = {Three-dimensional manipulation with scanning near-field optical nanotweezers},
    journal = {Nat Nano},
    year = {2014},
    volume = {9},
    pages = {295--299},
    number = {4},
    month = apr,
    abstract = {Recent advances in nanotechnologies have prompted the need for tools
    to accurately and non-invasively manipulate individual nano-objects.
    Among the possible strategies, optical forces have been predicted
    to provide researchers with nano-optical tweezers capable of trapping
    a specimen and moving it in three dimensions. In practice, however,
    the combination of weak optical forces and photothermal issues has
    thus far prevented their experimental realization. Here, we demonstrate
    the first three-dimensional optical manipulation of single 50 nm
    dielectric objects with near-field nanotweezers. The nano-optical
    trap is built by engineering a bowtie plasmonic aperture at the extremity
    of a tapered metal-coated optical fibre. Both the trapping operation
    and monitoring are performed through the optical fibre, making these
    nanotweezers totally autonomous and free of bulky optical elements.
    The achieved trapping performances allow for the trapped specimen
    to be moved over tens of micrometres over a period of several minutes
    with very low in-trap intensities. This non-invasive approach is
    foreseen to open new horizons in nanosciences by offering an unprecedented
    level of control of nanosized objects, including heat-sensitive biospecimens.},
    issn = {1748-3387},
    owner = {Berthelot},
    publisher = {Nature Publishing Group},
    timestamp = {2016.06.24},
    url = {http://dx.doi.org/10.1038/nnano.2014.24}
  • [PDF] Pau Mestres, Johann Berthelot, Srdjan S. Acimovic, and Romain Quidant. Unraveling the optomechanical nature of plasmonic trapping. Light sci appl., 5:e16092–, 2016.
    author = {Mestres, Pau and Berthelot, Johann and Acimovic, Srdjan S and Quidant,
    title = {Unraveling the optomechanical nature of plasmonic trapping},
    journal = {Light Sci Appl.},
    year = {2016},
    volume = {5},
    pages = {e16092--},
    month = jul,
    abstract = {Noninvasive and ultra-accurate optical manipulation of nanometer objects
    has recently gained interest as a powerful tool in nanotechnology
    and biophysics. Self-induced back-action (SIBA) trapping in nano-optical
    cavities has the unique potential for trapping and manipulating nanometer-sized
    objects under low optical intensities. However, thus far, the existence
    of the SIBA effect has been shown only indirectly via its enhanced
    trapping performances. In this article, we present the first time
    direct experimental evidence of the self-reconfiguration of the optical
    potential that is experienced by a nanoparticle trapped in a plasmonic
    nanocavity. Our observations enable us to gain further understanding
    of the SIBA mechanism and to determine the optimal conditions for
    boosting the performances of SIBA-based nano-optical tweezers.},
    comment = {Supplementary information available for this article at http://www.nature.com/lsa/journal/v5/n7/suppinfo/lsa201692s1.html},
    keywords = {nanophotonics, optomechanics, optical trapping, plasmonics},
    owner = {Berthelot},
    publisher = {CIOMP.},
    timestamp = {2016.07.01},
    url = {http://dx.doi.org/10.1038/lsa.2016.92}
Optomechanics with nano-objects:

At the frontier between nano-optics and mechanics, we investigate novel nano-optomechanical systems as platforms for ultrasensitive metrology and fundamental quantum mechanical studies. Activities include trapping and cooling of nanoparticles in vacuum.

Related publications:

  • [PDF] Irene Alda, Johann Berthelot, Raul A. Rica, and Romain Quidant. Trapping and manipulation of individual nanoparticles in a planar paul trap. Arxiv, pages arXiv:1606.04829, 2016.
    author = {Alda, Irene and Berthelot, Johann and Rica, Raul A. and Quidant,
    title = {Trapping and manipulation of individual nanoparticles in a planar
    Paul trap},
    journal = {ArXiv},
    year = {2016},
    pages = {arXiv:1606.04829},
    owner = {Berthelot},
    timestamp = {2016.07.03}
  • [PDF] [DOI] Pau Mestres, Johann Berthelot, Marko Spasenovic, Jan Gieseler, Lukas Novotny, and Romain Quidant. Cooling and manipulation of a levitated nanoparticle with an optical fiber trap. Applied physics letters, 107(15), 2015.
    author = {Mestres, Pau and Berthelot, Johann and Spasenovic, Marko and Gieseler,
    Jan and Novotny, Lukas and Quidant, Romain},
    title = {Cooling and manipulation of a levitated nanoparticle with an optical
    fiber trap},
    journal = {Applied Physics Letters},
    year = {2015},
    volume = {107},
    number = {15},
    eid = {151102},
    doi = {http://dx.doi.org/10.1063/1.4933180},
    owner = {Berthelot},
    timestamp = {2016.06.24},
    url = {http://scitation.aip.org/content/aip/journal/apl/107/15/10.1063/1.4933180}

Thesis at ICB (File) U-Bourgogne

From 10/2008 to 10/2011
Plasmonic tuner:

In this project we decided to fabricate a plasmonic tuner controle by an external electrical command and based on optical antenna. Optical antennas are elementary units used to direct optical radiation to the nanoscale. These objects are passive devices and their optical properties are defined by the fabrications processes and surrounding environment. Here we demonstrate an active control over individual antenna performances by an external electrical trigger. To obtain this result, we immersed the optical antennas in a birefringent liquid medium. This medium has the particularity of changing the refractive index of the surrounding medium by applying and external static electrical field. We find that by an in-plane command of an anisotropic load medium, the electromagnetic interaction between individual elements constituting an optical antenna can be controlled, resulting in a strong polarization and tuning response. An active command of the antenna is a prerequisite for directing light wave through the utilization of such a device.


Related publications:

  • [PDF] [DOI] Johann Berthelot, Alexandre Bouhelier, Caijin Huang, Jérémie Margueritat, Gérard Colas-des-Francs, Eric Finot, Jean-Claude Weeber, Alain Dereux, Sergei Kostcheev, Hicham Ibn El Ahrach, Anne-Laure Baudrion, Jérôme Plain, Renaud Bachelot, Pascal Royer, and Gary P. Wiederrecht. Tuning of an optical dimer nanoantenna by electrically controlling its load impedance. Nano letters, 9(11):3914-3921, 2009. PMID: 19754071
    author = {Johann Berthelot and Alexandre Bouhelier and Caijin Huang and Jérémie
    Margueritat and Gérard Colas-des-Francs and Eric Finot and Jean-Claude
    Weeber and Alain Dereux and Sergei Kostcheev and Hicham Ibn El Ahrach
    and Anne-Laure Baudrion and Jérôme Plain and Renaud Bachelot and
    Pascal Royer and Gary P. Wiederrecht},
    title = {Tuning of an Optical Dimer Nanoantenna by Electrically Controlling
    Its Load Impedance},
    journal = {Nano Letters},
    year = {2009},
    volume = {9},
    pages = {3914-3921},
    number = {11},
    note = {PMID: 19754071},
    doi = {10.1021/nl902126z},
    eprint = { http://dx.doi.org/10.1021/nl902126z },
    owner = {Berthelot},
    timestamp = {2016.06.24},
    url = { http://dx.doi.org/10.1021/nl902126z
  • [PDF] [DOI] C. Huang, A. Bouhelier, J. Berthelot, G. Colas des-Francs, E. Finot, J. -C. Weeber, A. Dereux, S. Kostcheev, A. -L. Baudrion, J. Plain, R. Bachelot, P. Royer, and G. P. Wiederrecht. External control of the scattering properties of a single optical nanoantenna. Applied physics letters, 96(14), 2010.
    author = {Huang, C. and Bouhelier, A. and Berthelot, J. and des-Francs, G.
    Colas and Finot, E. and Weeber, J.-C. and Dereux, A. and Kostcheev,
    S. and Baudrion, A.-L. and Plain, J. and Bachelot, R. and Royer,
    P. and Wiederrecht, G. P.},
    title = {External control of the scattering properties of a single optical
    journal = {Applied Physics Letters},
    year = {2010},
    volume = {96},
    number = {14},
    eid = {143116},
    doi = {http://dx.doi.org/10.1063/1.3385155},
    owner = {Berthelot},
    timestamp = {2016.06.24},
    url = {http://scitation.aip.org/content/aip/journal/apl/96/14/10.1063/1.3385155}
Electro-plasmonic transduction :

In this project, we were interested by the development of electro-plasmonic sources, in other words a source of surface plasmon excited electrically. In this aim, two different approaches have been studied: the first one concerns the use of carbon nanotube in a field effect transistor configuration, and the second tunnel junctions made with electromigration process.


Related publication:

  • [PDF] [DOI] Mickael Buret, Alexander V. Uskov, Jean Dellinger, Nicolas Cazier, Marie-Maxime Mennemanteuil, Johann Berthelot, Igor V. Smetanin, Igor E. Protsenko, Gérard Colas-des-Francs, and Alexandre Bouhelier. Spontaneous hot-electron light emission from electron-fed optical antennas. Nano letters, 15(9):5811-5818, 2015. PMID: 26214575
    author = {Mickael Buret and Alexander V. Uskov and Jean Dellinger and Nicolas
    Cazier and Marie-Maxime Mennemanteuil and Johann Berthelot and Igor
    V. Smetanin and Igor E. Protsenko and Gérard Colas-des-Francs and
    Alexandre Bouhelier},
    title = {Spontaneous Hot-Electron Light Emission from Electron-Fed Optical
    journal = {Nano Letters},
    year = {2015},
    volume = {15},
    pages = {5811-5818},
    number = {9},
    note = {PMID: 26214575},
    doi = {10.1021/acs.nanolett.5b01861},
    eprint = { http://dx.doi.org/10.1021/acs.nanolett.5b01861 },
    owner = {Berthelot},
    timestamp = {2016.06.24},
    url = { http://dx.doi.org/10.1021/acs.nanolett.5b01861
  • [PDF] [DOI] Nicolai Hartmann, Giovanni Piredda, Johann Berthelot, Gérard Colas des Francs, Alexandre Bouhelier, and Achim Hartschuh. Launching propagating surface plasmon polaritons by a single carbon nanotube dipolar emitter. Nano letters, 12(1):177-181, 2012. PMID: 22175822
    author = {Nicolai Hartmann and Giovanni Piredda and Johann Berthelot and Gérard
    Colas des Francs and Alexandre Bouhelier and Achim Hartschuh},
    title = {Launching Propagating Surface Plasmon Polaritons by a Single Carbon
    Nanotube Dipolar Emitter},
    journal = {Nano Letters},
    year = {2012},
    volume = {12},
    pages = {177-181},
    number = {1},
    note = {PMID: 22175822},
    doi = {10.1021/nl203270b},
    eprint = { http://dx.doi.org/10.1021/nl203270b },
    owner = {Berthelot},
    timestamp = {2016.06.24},
    url = { http://dx.doi.org/10.1021/nl203270b
  • [PDF] [DOI] P. Rai, N. Hartmann, J. Berthelot, J. Arocas, G. Colas des Francs, A. Hartschuh, and A. Bouhelier. Electrical excitation of surface plasmons by an individual carbon nanotube transistor. Phys. rev. lett., 111:26804, Jul 2013.
    author = {Rai, P. and Hartmann, N. and Berthelot, J. and Arocas, J. and Colas
    des Francs, G. and Hartschuh, A. and Bouhelier, A.},
    title = {Electrical Excitation of Surface Plasmons by an Individual Carbon
    Nanotube Transistor},
    journal = {Phys. Rev. Lett.},
    year = {2013},
    volume = {111},
    pages = {026804},
    month = {Jul},
    doi = {10.1103/PhysRevLett.111.026804},
    issue = {2},
    numpages = {5},
    owner = {Berthelot},
    publisher = {American Physical Society},
    timestamp = {2016.06.24},
    url = {http://link.aps.org/doi/10.1103/PhysRevLett.111.026804}
  • [PDF] [DOI] Padmnabh Rai, Nicolai Hartmann, Johann Berthelot, Gérard Colas-des-Francs, Achim Hartschuh, and Alexandre Bouhelier. In-plane remote photoluminescence excitation of carbon nanotube by propagating surface plasmon. Opt. lett., 37(22):4711–4713, Nov 2012.
    author = {Padmnabh Rai and Nicolai Hartmann and Johann Berthelot and G\'{e}rard
    Colas-des-Francs and Achim Hartschuh and Alexandre Bouhelier},
    title = {In-plane remote photoluminescence excitation of carbon nanotube by
    propagating surface plasmon},
    journal = {Opt. Lett.},
    year = {2012},
    volume = {37},
    pages = {4711--4713},
    number = {22},
    month = {Nov},
    abstract = {In this work, we demonstrate propagating surface plasmon polariton
    (SPP) coupled photoluminescence (PL) excitation of single-walled
    carbon nanotube (SWNT). SPPs were launched at a few micrometers from
    individually marked SWNT, and plasmon-coupled PL was recorded to
    determine the efficiency of this remote in-plane addressing scheme.
    The efficiency depends upon the following factors: (i)\&\#xA0;longitudinal
    and transverse distances between the SPP launching site and the location
    of the SWNT and (ii)\&\#xA0;orientation of the SWNT with respect
    to the plasmon propagation wave vector (kSPP). Our experiment explores
    the possible integration of carbon nanotubes as a plasmon sensor
    in plasmonic and nanophotonic devices.},
    doi = {10.1364/OL.37.004711},
    keywords = {Remote sensing and sensors ; Surface plasmons; Fluorescence, laser-induced},
    owner = {Berthelot},
    publisher = {OSA},
    timestamp = {2016.06.24},
    url = {http://ol.osa.org/abstract.cfm?URI=ol-37-22-4711}
  • [PDF] [DOI] Arnaud Stolz, Johann Berthelot, Marie-Maxime Mennemanteuil, Gérard Colas des Francs, Laurent Markey, Vincent Meunier, and Alexandre Bouhelier. Nonlinear photon-assisted tunneling transport in optical gap antennas. Nano letters, 14(5):2330-2338, 2014. PMID: 24697629
    author = {Arnaud Stolz and Johann Berthelot and Marie-Maxime Mennemanteuil
    and Gérard Colas des Francs and Laurent Markey and Vincent Meunier
    and Alexandre Bouhelier},
    title = {Nonlinear Photon-Assisted Tunneling Transport in Optical Gap Antennas},
    journal = {Nano Letters},
    year = {2014},
    volume = {14},
    pages = {2330-2338},
    number = {5},
    note = {PMID: 24697629},
    doi = {10.1021/nl404707t},
    eprint = { http://dx.doi.org/10.1021/nl404707t },
    owner = {Berthelot},
    timestamp = {2016.06.24},
    url = { http://dx.doi.org/10.1021/nl404707t
Plasmonic waveguiding:

In this project, we aimed at control the light at the nanoscale. This is possible with plasmonic waveguides. We study the propagation over different geometry of waveguide and found the conversion of a 2D plasmon into a one-dimensional wave through the edge of the structure.

Related publications:

  • [PDF] [DOI] Johann Berthelot, Alexandre Bouhelier, Gérard Colas des Francs, Jean-Claude Weeber, and Alain Dereux. Excitation of a one-dimensional evanescent wave by conical edge diffraction of surface plasmon. Opt. express, 19(6):5303–5312, Mar 2011.
    author = {Johann Berthelot and Alexandre Bouhelier and G\'{e}rard Colas des
    Francs and Jean-Claude Weeber and Alain Dereux},
    title = {Excitation of a one-dimensional evanescent wave by conical edge diffraction
    of surface plasmon},
    journal = {Opt. Express},
    year = {2011},
    volume = {19},
    pages = {5303--5312},
    number = {6},
    month = {Mar},
    abstract = {The experimental observation of a one-dimensional evanescent wave
    supported by a 90{\textdegree} metal edge is reported. Through a
    measurement of in-plane momenta, we clearly demonstrate the dimensional
    character of this surface wave and show that it is non-radiative
    in the superstrate. Excitation conditions, lateral extension and
    polarization properties of this wave are discussed. Finally, we explore
    the effect of the surrounding dielectric medium and demonstrate that
    a single edge can sustain distinct excitations.},
    doi = {10.1364/OE.19.005303},
    keywords = {Optics at surfaces; Surface plasmons; Total internal reflection; Linear
    and nonlinear light scattering from surfaces},
    owner = {Berthelot},
    publisher = {OSA},
    timestamp = {2016.06.24},
    url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-19-6-5303}
  • [PDF] [DOI] Johann Berthelot, Francesco Tantussi, Padmnabh Rai, Gérard Colas des Francs, Jean-Claude Weeber, Alain Dereux, Francesco Fuso, Maria Allegrini, and Alexandre Bouhelier. Determinant role of the edges in defining surface plasmon propagation in stripe waveguides and tapered concentrators. J. opt. soc. am. b, 29(2):226–231, Feb 2012.
    author = {Johann Berthelot and Francesco Tantussi and Padmnabh Rai and G\'{e}rard
    Colas des Francs and Jean-Claude Weeber and Alain Dereux and Francesco
    Fuso and Maria Allegrini and Alexandre Bouhelier},
    title = {Determinant role of the edges in defining surface plasmon propagation
    in stripe waveguides and tapered concentrators},
    journal = {J. Opt. Soc. Am. B},
    year = {2012},
    volume = {29},
    pages = {226--231},
    number = {2},
    month = {Feb},
    abstract = {In this paper, we experimentally show the effect of waveguide discontinuity
    on the propagation of the surface plasmon in metal stripes and tapered
    terminations. Dual-plane leakage microscopy and near-field microscopy
    were performed on Au stripes with varied widths to image the surface
    plasmon intensity distribution in real and reciprocal spaces. We
    unambiguously demonstrate that edge diffraction is the limiting process
    determining the cutoff conditions of the surface plasmon mode. Finally,
    we determine the optimal tapered geometry leading to the highest
    doi = {10.1364/JOSAB.29.000226},
    keywords = {Integrated optics; Guided waves; Optics at surfaces; Surface plasmons},
    owner = {Berthelot},
    publisher = {OSA},
    timestamp = {2016.06.24},
    url = {http://josab.osa.org/abstract.cfm?URI=josab-29-2-226}