Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines cond-mat
Date Lundi 3 Avril 2023
Heure 13:30
Institut LPENS
Salle Salle Froidevaux (Département de géosciences de l'ENS)
Nom de l'orateur Delteil
Prenom de l'orateur Aymeric
Addresse email de l'orateur
Institution de l'orateur Groupe d'Etude de la Matière Condensée, GEMaC
Titre Top-down integrated quantum photonics using hexagonal boron nitride
Résumé In the context of photonic quantum information science, the 2D material hexagonal boron nitride (hBN) has emerged as a very promising material, allowing realisation of compact heterostructures and integrated photonic devices. Moreover, this wide-gap material hosts single-photon emitters with advantageous optical properties. However, these deep defects initially suffered from random emission wavelength and spatial location, thereby limiting their scalability for practical applications. We have recently demonstrated a technique to generate quantum emitters in hBN with controlled position and wavelength. The emitters are locally activated in exfoliated hBN single crystals using a focused electron beam, opening the way for top-down integration in nanostructures. They exhibit bright and narrow lines with high optical coherence and low ensemble distribution. I will present their fabrication technique, their optical properties and coherent control, as well as a two-photon interference experiment to evaluate their indistinguishability. I will also show recent results of deterministic integration into photonic structures. Altogether, the controlled generation of coherent quantum emitters in 2D materials open appealing perspectives in quantum photonics.
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