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Stimulated Emission Depletion Spectroscopy of Color Centers in Hexagonal Boron Nitride.

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 | 2021 Apr

REPOSITORIES: biostudies-literature

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Stimulated Emission Depletion Spectroscopy of Color Centers in Hexagonal Boron Nitride.

Malein Ralph Nicholas Edward RNE Khatri Prince P Ramsay Andrew J AJ Luxmoore Isaac J IJ

ACS photonics 20210407 4

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 ...[more]

PMID: 34056033

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