Quantum emission from engineered defects in hexagonal boron nitride

Speaker: Mehran Kianinia
Affiliation: University of Technology, Sydney

Abstract

Solid-state quantum light sources are emerging as promising candidates for various quantum technologies. Among them, optically active point defects in hexagonal boron nitride (hBN) have garnered significant attention due to their exceptional brightness, robustness, and ability to operate at temperatures as high as 800K. Moreover, recent studies have demonstrated optically addressable spin states within these defects, expanding their potential for quantum storage and sensing.

In this talk, I will present an overview of our group's recent research on quantum emitters in hBN. Specifically, I will discuss cryogenic spectroscopy of single defects in hBN and an in-depth investigation of their optical coherence. Additionally, I will cover the fabrication and optical properties of stable B-centers in hBN, highlighting their stable photoluminescence and coherence, which are determined by their permanent optical dipole moment and symmetry. Furthermore, I will share our progress on the study and creation of spin defects in hBN, along with our efforts to understand their complex spin-level structure. Our research aims to unlock the full potential of quantum emitters in hBN by establishing a fundamental understanding and a deterministic approach for generating defects with optimal optical properties.