论文标题
探测识别氮化硼的量子发射器的光学动力学
Probing the Optical Dynamics of Quantum Emitters in Hexagonal Boron Nitride
论文作者
论文摘要
六角硼硝化物是一种范德华的材料，可在室温下容纳可见的波长量子发射器。然而，缺乏量子发射器电子结构的实验鉴定，其电荷和自旋特性的关键细节仍然未知。在这里，我们使用光子发射相关光谱探测了六角硼硼化硼的量子发射器的光学动力学。几个量子发射器表现出理想的单光子发射，并具有噪声限制的光子抗发射，$ g^{（2）}（0）= 0 $。光致发光发射线形与单个振动跃迁一致。然而，极化分辨的激发和发射表明了多种光学跃迁的作用，光子发射相关光谱揭示了通过多个电子激发态通过激发和放松相关的复杂的光学动力学。我们将实验结果与定量光学动力学模拟进行比较，开发与观测值一致的电子结构模型，并在从头算理论计算的背景下讨论结果。
Hexagonal boron nitride is a van der Waals material that hosts visible-wavelength quantum emitters at room temperature. However, experimental identification of the quantum emitters' electronic structure is lacking, and key details of their charge and spin properties remain unknown. Here, we probe the optical dynamics of quantum emitters in hexagonal boron nitride using photon emission correlation spectroscopy. Several quantum emitters exhibit ideal single-photon emission with noise-limited photon antibunching, $g^{(2)}(0)=0$. The photoluminescence emission lineshapes are consistent with individual vibronic transitions. However, polarization-resolved excitation and emission suggests the role of multiple optical transitions, and photon emission correlation spectroscopy reveals complicated optical dynamics associated with excitation and relaxation through multiple electronic excited states. We compare the experimental results to quantitative optical dynamics simulations, develop electronic structure models that are consistent with the observations, and discuss the results in the context of ab initio theoretical calculations.
