qnD is back...

Posted on 06/06/2018

Back online!

Champagne-Ardenne PhD Prize for N. Rahbany

Posted on 5/11/2017

Congratulations to Nancy Rahbany who obtained the Champagne-Ardenne PhD award. She passed her PhD in 2016 under the supervision of CC and Renaud Bachelot working on 'Towards integrated optics at the nanoscale: plasmon-emitter coupling using plasmonic structures'. She is now doing a post-doc at the Langevin Institute at the ESPCI in Paris.

Research habilitation for CC

Posted on 5/5/2017

Just passed my research habilitation (HdR) at the Université Pierre and Marie Curie, Sorbonne Université with the title 'Harnessing light-matter interaction: applications in nanophotonics and quantum technologies' with the jury composed of Jean-Michel Raimond (UPMC, ENS), Elisabeth Giacobino (CNRS, ENS), Carlo Sirtori (Paris Diderot), Rémi Carminati (ESPCI), John Rarity (University of Bristol) and Sébastien Tanzilli (CNRS and Université de Nice).

ITN project LIMQUET accepted!

Posted on 5/2/2017

We are part of a European Innovative Training Network (ITN) that has been accepted on Light-Matter Interface for Enabling Quantum Technologies (LIMQUET) with the University of Bourgogne (project coordinator), the University of Oxford, Darmstad University, EPFL Lausanne, the University of Sussex, the University of Sofia and the companies TeemPhotonics, Qubig and Qutools.

Single Photons Single Spins II workshop at the UTT

Posted on 4/18/2017

This is the first announcement for the Second Topical Meeting on Single Photons Single Spins (SPSS II), to be held in Troyes, France on August 29th to September 1st 2017. Save the date!

The goal of this meeting is to bring together academic and industrial European actors in the fields of

  • Spin-photon interfaces,
  • Nanoscale single-photon sources and detectors,
  • Quantum networks with nanoscale devices,
  • Applied quantum nanophotonics,
  • Single-spin quantum sensing,
  • Fundamental studies with nanoscale structures

Confirmed keynote speakers

  • Natalia Ates, University of Oxford
  • Christoph Becher, Saarland University
  • Sophia Economou, Virginia Tech
  • Chris Erven, KETS and University of Bristol
  • Patrick Maletinsky, University of Basel and Qnami
  • Boris Naydenov, University of Ulm
  • Ruth Oulton, University of Bristol

Please find more information at
Abstract submission deadline : May 27th
Registration deadline : July 29th

The meeting is organized by the COST Action on 'Nanoscale Quantum Optics' MP1403 and more specifically jointly by the Working Group 1 and Working Group 3 (see more information here We thank the support from the CNRS GdR IQFA on Quantum Engineering (see more information here

The organizing committee

  • Christophe Couteau - University of Technology of Troyes -
  • Félix Bussières - University of Geneva -
  • Thomas Durt - University of Marseille
  • Anna Fontcuberta i Morral - EPFL Lausanne
  • Peter Lodahl - Niels Bohr Institute
  • Jason Smith - Oxford University

Information :

Article in Nanotechnology

Posted on 3/6/2017

Latest article published and entitled: 'Plasmon–emitter interaction using integrated ring grating–nanoantenna structures.' by N. Rahbany, W. Geng, R. Bachelot, & C. Couteau in Nanotechnology 28, 185201 (2017).

Here is the abstract :

Overcoming the diffraction limit to achieve high optical resolution is one of the main challenges in the fields of plasmonics, nanooptics and nanophotonics. In this work, we introduce novel plasmonic structures consisting of nanoantennas (nanoprisms, single bowtie nanoantennas and double bowtie nanoantennas) integrated in the center of ring diffraction gratings. Propagating surface plasmon polaritons (SPPs) are generated by the ring grating and coupled with localized surface plasmons (LSPs) at the nanoantennas exciting emitters placed in their gap. SPPs are widely used for optical waveguiding but provide low resolution due to their weak spatial confinement. In contrast, LSPs provide excellent sub-wavelength confinement but induce large losses. The phenomenon of SPP–LSP coupling witnessed in our structures allows for achieving more precise focusing at the nanoscale, causing an increase in the fluorescence emission of the emitters. Finite-difference time-domain simulations as well as experimental fabrication and optical characterization results are presented to study plasmon–emitter coupling between an ensemble of dye molecules and our integrated plasmonic structures. A comparison is given to highlight the importance of each structure on the photoluminescence and radiative decay enhancement of the molecules.

NFO15 in 2018 will be at the UTT

Posted on 2/2/2017

Grest news for the UTT and the LNIO, the international conference on Near-Field Optics NFO15 will be held at the UTT in Troyes from the 26th to the 30th August 2018.

Latest article published in Appl. opt.

Posted on 1/15/2017

Latest article published and entitled: 'Integrated optical waveguides in glass for enhanced photoluminescence of nano-emitters.'by J. B. Madrigal, R. Tellez-Limon, F. Gardillou, D. Barbier, W. Geng, C. Couteau, R. Salas-Montiel, & S. Blaize in Applied Optics 55, 10263 (2016).

Here is the abstract :

Integrated optical devices able to control light–matter interactions on the nanoscale have attracted the attention of the scientific community in recent years. However, most of these devices are based on silicon waveguides, limiting their use for telecommunication wavelengths. In this contribution, we propose an integrated device that operates with light in the visible spectrum. The proposed device is a hybrid structure consisting of a high-refractive-index layer placed on top of an ion-exchanged glass waveguide. We demonstrate that this hybrid structure serves as an efficient light coupler for the excitation of nanoemitters. The numerical and experimental results show that the device can enhance the electromagnetic field confinement up to 11 times, allowing a higher photoluminescence signal from nanocrystals placed on its surface. The designed device opens new perspectives in the generation of new optical devices suitable for quantum information or for optical sensing.

New cryostat from Attocube!

Posted on 1/4/2017

Just received a cryostat from Attocube for low temperature photoluminescence of nanostructures. Comes with a magnetic field that can go up to 9 T. Nice toy.



2017 CLEO Pacific Rim Conference
in Singapore
31 July-04 August 2017

Single Photons Single Spins II
(SPSSII) Meeting, University of Technology of Troyes,
29 August-01 September 2017.

COST Nanoscale Quantum Optics (NQO)