Stimulated Emission Depletion Spectroscopy of Color Centers in Hexagonal Boron Nitride.
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ABSTRACT: We demonstrate the use of Stimulated Emission Depletion (STED) spectroscopy to map the electron-optical-phonon sideband of the ground state of the radiative transition of color centers in hexagonal boron nitride emitting at 2.0-2.2 eV, with in-plane linear polarization. The measurements are compared to photoluminescence of excitation (PLE) spectra that maps the electron-optical-phonon sideband of the excited state. The main qualitative difference is a red-shift in the longitudinal optical phonon peak associated with E 1u symmetry at the zone center. We compare our results to theoretical work on different defect species in hBN and find they are consistent with a carbon-based defect.
SUBMITTER: Malein RNE
PROVIDER: S-EPMC8155571 | biostudies-literature |
REPOSITORIES: biostudies-literature
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