Le jeudi 5 Janvier 2023 à 15h00, David Wilkoski donnera un séminaire intitulé "Champs superoscillants pour le piégeage d’un atome unique" dans la salle Pierre Cotton de l’Institut Fresnel.
Résumé :
Controlled trapping of individual atoms and their ensembles is of growing interest for quantum simulations of many body systems, optical clocks, and beyond. In this talk, I will present our recent work on trapping a single ultracold atom in an optical trap that can be continuously tuned from a standard Airy focus to a subwavelength hotspot smaller than the usual Abbe’s diffraction limit. The hotspot was generated using the effect of superoscillations, by the precise interference of multiple free-space coherent waves. We characterized the superoscillatory optical trap by measuring the atom effective temperature, lifetime, and the trap frequency. We argue that superoscillatory trapping and continuous potential tuning offers not only a way to generate compact and tenable ensembles of trapped atoms for quantum simulators but will also be useful in single molecule quantum chemistry and the study of cooperative atom-photon interaction within subwavelength periodic arrays of quantum emitters.
Ce séminaire est organisé par le Thème Nanophotonique (Optique Quantique)
Contact : Thomas DURT, équipe CLARTE
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