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

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.

In an article recently published in Physical Review Applied, we study the influence of resonant optical nanoantennas made of silicon on the spontaneous emission properties of fluorescent molecules. This collaborative study highlights how dielectric resonators can either enhance or inhibit spontaneous emission ; and can also allow increased photon collection efficiencies in an optical microscope.

In a recent ACS Nano article, we describe the large-scale fabrication of colloidal single-photon emitters with lifetimes down to a few picoseconds and quantum yields that can reach 70 %. These emitters are obtained by introducing a single fluorescent molecule on the 10 nm-long DNA double-strand that links two gold nanoparticles. This study was performed in collaboration with Institut Fresnel in Marseille.

Full list of publications

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