AI 中文总结
研究将苝分子纳入多层六方氮化硼堆叠，通过振动光谱分析、高光谱定位测量与量子化学计算相结合的方法，明确光子发射起源，研究分子插入机制，为将窄线宽分子发射器集成到范德华器件提供见解。
AI 中文摘要
嵌入有机基质中的单多环芳烃分子已被证明是一类出色的窄线宽量子发射器。将这种主客体体系扩展到范德华材料，有机会将分子发射器的卓越特性与二维异质结构及器件的多功能性相结合。在这项工作中，我们将苝分子纳入多层六方氮化硼堆叠中，并在低温下观察到千兆赫兹窄的零声子线跃迁。通过振动光谱分析明确验证了光子发射的起源。结合高光谱定位测量和量子化学计算，研究了苝分子在六方氮化硼堆叠中的插入机制，得出原始hBN层倾向于将分子从夹层中排出，而扩展的形态缺陷、羟基以及未钝化的硼和氮原子有助于稳定分子与hBN的结合。我们的工作为未来将窄线宽分子发射器确定性地集成到范德华器件中的工作提供了有价值的见解。
英文摘要
Single polycyclic aromatic hydrocarbon molecules embedded in organic matrices have proven to be an excellent family of narrow-linewidth quantum emitters. Extending this host-guest setting to van der Waals materials offers the opportunity to combine the preeminent properties of molecular emitters with the access to the versatility of two-dimensional hetero-structures and devices. In this work, we incorporate perylene molecules into multi-layered hexagonal boron nitride stacks and observe gigahertz-narrow zero-phonon-line transitions at cryogenic temperatures. We unambiguously verify the origins of photon emission through vibronic spectra analysis. By combining hyperspectral localization measurements with quantum chemistry calculations, we examine the insertion mechanisms of perylene molecules in the hexagonal boron nitride stacks, and conclude that pristine hBN layers tend to expel molecules from the sandwich, while extended morphological defects, hydroxyl groups and unpassivated boron and nitrogen atoms assist to stabilize molecular bindings to hBN. Our work provides valuable insight for future work to deterministically integrate narrow-linewidth molecular emitters into van der Waals devices.
