Optical Antennas & Metasurfaces

Group members         Publications         Collaborations and Funding  

Our group is interested in the development of optical antennas and resonant metasurfaces for enhanced light-matter interactions at the nanoscale, with applications in single photon sources, nonlinear optics or biochemical sensing. In particular, we develop DNA templated plasmonic antennas, disodered plasmonic metasurfaces and nanometer-scale dielectric resonators.

We are always interested in PhD and post-doc candidates. Please contact Dr. Sebastien Bidault (sebastien.bidault (arobase) espci.fr) for information on our current openings.

Recent Highlights

Are gold and silver nanocubes the solution to reach reproducible single molecule strong coupling at room temperature ? This is what we propose in a theoretical study published in The Journal of Physical Chemistry Letters. We expect a typical increase of the Purcell factor by a factor of 10 in dimers of plasmonic nanocubes compared to dimers of faceted particles typically used in strong coupling studies, combined with high emission yields close to 40% for gold and larger than 60% for silver nanocubes, compared to less than 20% for gold spheres.

Reaching a strong coupling regime between a plasmonic resonator and a controlled number of quantum emitters is technically challenging at room temperature because of ultrafast damping mechanisms. In an article published in ACS Nano, we demonstrate that DNA based self-assembly, associated with an active control of the nanometer gap between two gold nanoparticles, provides the required nanoscale resolution to reach this coupling regime with 5 dye molecules. Classical electrodynamic simulations performed in collaboration with Institut Fresnel are in excellent agreement with the measured emitter-resonator coupling strengths.

In a recent letter published in ACS Photonics, we propose a novel statistical imaging scheme to offset the structural complexity of disordered nanophotonic surfaces. In this collaboration with Laboratoire Kastler Brossel, we demonstrate, in particular, that localized and delocalized plasmonic modes can be mapped independently using randomly wavefront-shaped femtosecond excitations.

Full list of publications

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