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

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.

In collaboration with colleagues from Laboratoire Kastler Brossel, we publish in Nano Letters a study that demonstrates how optical hot-spots and nonlinear luminescence can be locally enhanced in disordered gold metasurfaces using far-field wavefront control of plasmonic modes and femtosecond excitation. This work not only demonstrates how recent concepts of wavefront shaping in disordred media can be adapted to plasmonic systems but it also opens exciting perspectives for the development of programmable metasurfaces for field-enhanced spectroscopy.

Full list of publications

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