Nanoscale axial position and orientation measurement of hexagonal boron nitride quantum emitters using a tunable nanophotonic environment.
Pankaj K JhaHamidreza AkbariYonghwi KimSouvik BiswasHarry A AtwaterPublished in: Nanotechnology (2021)
Color centers in hexagonal boron nitride (hBN) have emerged as promising candidates for single-photon emitters (SPEs) due to their bright emission characteristics at room temperature. In contrast to mono- and few-layeredhBN, color centers in multi-layered flakes show superior emission characteristics such as higher saturation counts and spectral stability. Here, we report a method for determining both the axial position and three-dimensional dipole orientation of SPEs in thickhBN flakes by tuning the photonic local density of states using vanadium dioxide (VO2), a phase change material. Quantum emitters under study exhibit a strong surface-normal dipole orientation, providing some insight on the atomic structure ofhBN SPEs, deeply embedded in thick crystals. Next, we optimized a hot pickup technique to reproducibly transfer thehBN flake from VO2/sapphire substrate onto SiO2/Si substrate and relocated the same emitters. Our approach serves as a practical method to systematically characterize SPEs inhBN prior to integration in quantum photonics systems.
Keyphrases
- room temperature
- light emitting
- molecular dynamics
- energy transfer
- ionic liquid
- quantum dots
- reduced graphene oxide
- magnetic resonance
- monte carlo
- optical coherence tomography
- magnetic resonance imaging
- peripheral blood
- visible light
- gold nanoparticles
- mass spectrometry
- computed tomography
- high speed
- atomic force microscopy
- highly efficient
- structural basis
- magnetic nanoparticles
- electron transfer