Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 40: Poster: Quantum Optics and Photonics III
Q 40.22: Poster
Dienstag, 6. März 2018, 16:15–18:15, Zelt West
A close look on second order correlation measurements of quantum emitters in hexagonal boron nitride and their implications for the underlying level system — •Bernd Sontheimer1, Merle Braun1, Mehran Kianinia2, Igor Aharonovich2, and Oliver Benson1 — 1Institut für Physik, Humboldt-Universität zu Berlin, — 2School of Mathematical and Physical Sciences, University of Technology Sydney
Single photon sources (SPSs) are prime candidates for a myriad of applications in integrated quantum optics and information processing. Quantum emitters in hexagonal boron nitride (hBN), a wide-band-gap two-dimensional material, have recently emerged as promising SPSs. While the origin and atomic structure of these emitters are still under debate, they can exhibit remarkable properties including the ability of sub-band-gap excitation at room temperature, high brightness and short excited state lifetime. Here, we present our latest insights on the underlying level system and rate models gained from second-order correlation measurements of single photon streams emitted by isolated defects. By performing measurements at different excitation laser powers, we can carefully match the resulting graphs to theoretical predictions for different models and extract transition rates as well as saturation behaviors of the participating electronic states. We find at least one exceptionally long-lived metastable state and repumping mechanisms that can be exploited in super-resolution microscopy schemes.[1] Furthermore, our results experimentally complement density functional theory modeling of the emitters atomic structure. [1]arXiv:1709.08683