Status | Confirmed |
Seminar Series | LPENS-MDQ |
Subjects | cond-mat |
Date | Monday 3 April 2023 |
Time | 13:30 |
Institute | LPENS |
Seminar Room | Salle Froidevaux (Département de géosciences de l'ENS) |
Speaker's Last Name | Delteil |
Speaker's First Name | Aymeric |
Speaker's Email Address | |
Speaker's Institution | Groupe d'Etude de la Matière Condensée, GEMaC |
Title | Top-down integrated quantum photonics using hexagonal boron nitride |
Abstract | 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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