PhD defense
Developing a slow-mode nanophotonic platform for strong interaction between cold Rb atoms and guided photons
C2N - Centre de Nanosciences et de Nanotechnologies, , PalaiseauPhD defense
Light-matter interaction at the single-quanta level is the keystone of quantum information science. However, single quanta are generally weakly interacting and enhancing this coupling has been the driving force for a large community and the development of the cavity quantum electrodynamics (CQED), where single atoms and single photons can be strongly coupled via a high-finesse cavity. Very recently, integrated photonic nanostructures appeared as a promising avenue of tailoring light-matter interaction by engineering the emitter environment. Modern nanofabrication techniques have enabled the design of solid-state systems with embedded emitters, such as quantum dots in photonic crystal waveguides or nanocavities with high-quality factors, leading to Quantum Nanophotonics. In this context, we explore the waveguide QED approach by trapping atoms close to photonic crystal waveguides exhibiting slowly propagating modes, reaching strong interaction without a cavity.
Figure : Suspended slow mode Half W1 photonic crystal waveguide fabricated in GaInP during the thesis.
(in french) Croissance par épitaxie par jets moléculaires d'hétérostructures BiSb/MnGa pour l'étude de la conversion d'un courant de charge en courant de spin
Auditorium de Thales R&T, , PalaiseauPhD defense
figure : STEM-HAADF cross section of the BiSb(9 nm)/MnGa(10 nm)//GaAs(001) heterostructure