Probing the Optical Dynamics of Quantum Emitters in Hexagonal Boron Nitride

作     者：Raj N. Patel David A. Hopper Jordan A. Gusdorff Mark E. Turiansky Tzu-Yung Huang Rebecca E. K. Fishman Benjamin Porat Chris G. Van de Walle Lee C. Bassett 

作者机构：Quantum Engineering Laboratory Department of Electrical and Systems Engineering University of Pennsylvania Philadelphia Pennsylvania 19104 USA Department of Materials Science and Engineering University of Pennsylvania Philadelphia Pennsylvania 19104 USA Department of Physics University of California Santa Barbara California 93106 USA Department of Physics and Astronomy University of Pennsylvania Philadelphia Pennsylvania 19104 USA Materials Department University of California Santa Barbara California 93106 USA 

出 版 物：《PRX Quantum》 (PRX. Quantum.)

年 卷 期：2022年第3卷第3期

页      面：030331-030331页

核心收录：

基　　金：University of Pennsylvania Materials Research Science and Engineering Center National Science Foundation, NSF, (1922278, 1542153, DGE-1845298, DMR-1922278, DGE-1845298, ECCS-1542153) Materials Science, Engineering and Information, (ACI-1548562, DMR-1906325) Materials Research Science and Engineering Center, Harvard University, MRSEC, (DMR-1720530) 

主　　题：Color centers Photon statistics Quantum information architectures & platforms Quantum optics Single photon sources Fluorescence spectroscopy Time-resolved photoluminescence 

摘      要：Hexagonal boron nitride is a van der Waals material that hosts visible-wavelength quantum emitters at room temperature. However, experimental identification of the quantum emitters’ electronic structure is lacking, and key details of their charge and spin properties remain unknown. Here, we probe the optical dynamics of quantum emitters in hexagonal boron nitride using photon emission correlation spectroscopy. Several quantum emitters exhibit ideal single-photon emission with noise-limited photon antibunching, g(2)(0)=0. The photoluminescence emission lineshapes are consistent with individual vibronic transitions. However, polarization-resolved excitation and emission suggests the role of multiple optical transitions, and photon emission correlation spectroscopy reveals complicated optical dynamics associated with excitation and relaxation through multiple electronic excited states. We compare the experimental results to quantitative optical dynamics simulations, develop electronic structure models that are consistent with the observations, and discuss the results in the context of ab initio theoretical calculations.