论文标题
六角硼硝酸盐中颜色中心的刺激排放耗尽光谱
Stimulated emission depletion spectroscopy of color centers in hexagonal boron nitride
论文作者
论文摘要
我们证明了使用刺激的发射耗竭（STED）光谱法来绘制六角形氮化硼在2.0-2.2 eV下发射的辐射中心的辐射过渡的基态副侧带，并用平面内近极化。将测量值与激发（PLE）光谱的光致发光进行比较，这些光谱映射了激发态的电子光谱边带。主要的定性差异是与$ e_ {1u} $对称性在区域中心相关的纵向光学声子峰的红移。我们认为，这与最近对基于碳的线路缺陷的发现是一致的，并具有能量相似的激发态的混合。
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 argue that this is consistent with recent findings for a carbon-based line defect with admixture of energetically similar excited states.
