Direct measurement of quantum efficiency of single-photon emitters in hexagonal boron nitride
Journalartikel
Beschreibung
Single-photon emitters (SPEs) in two-dimensional materials are promising candidates for the future generation of quantum photonic technologies. In this work, we experimentally determine the quantum efficiency (QE) of SPEs in few-layer hexagonal boron nitride (h-BN). We employ a metal hemisphere that is attached to the tip of an atomic force microscope to directly measure the lifetime variation of the SPEs as the tip approaches the ℎ-BN. This technique enables nondestructive, yet direct and absolute measurement of the QE of SPEs. We find that the emitters exhibit very high QEs approaching (87$\pm$7)\% at wavelengths of $\approx$580{\hspace{0.167em}}}{\hspace{0.167em}}}nm, which is among the highest QEs recorded for a solid-state SPE $\~$ The cover of the corresponding Optica issue shows an illustration of our work. $\~$
Details zur Publikation
Autor*innen: Nikolay N, Mendelson N, Özelci E, Sontheimer B, Böhm F, Kewes G, Toth M, Aharonovich I, Benson O
Zeitschrift: Optica
Jahr der Veröffentlichung: 2019
Bandnummer: 6
Heftnummer: 8
