Mackrine Nahra E-mail: mackrine.nahra@utt.fr Phone: +33 (0)3 51 59 11 33 Institution: Université de Technologie de Troyes supervisor: Christophe Couteau

Project Title: Strong coupling regime in nanoscale plasmonic cavities (WP4)

Design and fabrication of novel hybrid nanostructure with high electromagnetic confinement and low losses, bring quantum optics with atomic physics to nanostructures and nanocavities, make parallels between quantum controls techniques use in atomic physics to quantum emitters at the nanoscale, reach the strong
coupling regime for a single emitter, a major milestone for quantum optics at the nanoscale. Understand the key parameters essentials for achieving this result such as the cavity design, the loss management and the efficient between different photonic structures with few interfaces: emitter to plasmons in the cavity to optical modes in the waveguides.
Mackrine will be co-supervise by TP. Interaction will be mainly on the designing part thanks to TP’s expertise in this area and the fabrication of the most adapted waveguides for the highest confinement. This will be done by choosing different ions for the ion-exchange migration in the glass for the smallest mode volumes.

Expected Results: Mackrine will devise and implement strong coupling at the nanoscale, via an efficient design and modeling of the system by finite difference time domain numerical and finite-elements methods and the knowledge of the relevant parameters in a nanostructure/metal cavity coupled system. She will design and fabricate hybrid structure made of dielectric and metallic materials. Strong confinement can be reached using dielectric structures such as ion-exchange waveguides provided by the TP partner combined with micro-structured dielectric thin films such as TiO 2 or ZnO at the surface. Carefully designed metallic nanoantennas on top are expected to provide a sufficient low Q so that the ratio Q/V is high enough for a strong coupling regime.

 

TP = Teem Photonics
 

Articles and reports:

– Article published in AVS Quantum Optics (2021), preprint
– Article published in Photonics Research (2020)
– Article published in Journal of Optics (2020)
– Article published in Nature Communications (2020)