发表机构
Institute for Experimental and Applied Physics, Kiel University（基尔大学实验与应用物理研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过阴极发光和光致发光光谱，在室温下实现了六方氮化硼量子发射体与等离子体金空腔的集体强耦合，观察到振动跃迁与腔模的杂化分裂，为控制多量子发射体相互作用提供了新途径。
AI 中文摘要
六方氮化硼（hBN）中的量子发射体因其明亮的室温发射而成为固态量子光子学中有前景的构建单元。这些发射体与晶格振动强烈相互作用，这在一定程度上支撑了其激发效率。在此，我们利用互补的阴极发光（CL）和光致发光（PL）光谱，在室温下演示了耦合到同一等离子体金空腔的hBN量子发射体之间的腔介导相互作用。阴极发光测量揭示，443 nm发射体的振动跃迁与腔模杂化，产生光谱分辨的分裂，而相邻的537 nm发射体尽管光谱重叠，仍保持在弱耦合状态。CL峰的能量分裂约为36.2 meV，而PL分辨的峰约为24.1 meV，这是由于每次电子激发时多个发射体的集体激发及其相互作用所致。麦克斯韦-布洛赫模拟重现了实验光谱，并将观察到的分裂识别为腔诱导杂化的结果。激发依赖的PL进一步表明，杂化态可以通过零声子跃迁以下的声子辅助激发来访问。这些结果表明，振动跃迁为控制混合等离子体纳米光子系统中多个量子发射体之间的相互作用提供了一条有效途径。
英文摘要
Quantum emitters in hexagonal boron nitride (hBN) are promising building blocks for solid-state quantum photonics because of their bright room-temperature emission. These emitters strongly interact with lattice vibrations, which partially underpins their excitation efficiency. Here, using complementary cathodoluminescence (CL) and photoluminescence (PL) spectroscopy, we demonstrate cavity-mediated interactions between hBN quantum emitters coupled to the same plasmonic Au void cavity at the room temperature. Cathodoluminescence measurements reveal that a vibronic transition of the 443 nm emitter hybridizes with the cavity mode, giving rise to a spectrally resolved splitting, while the neighboring 537 nm emitter remains in the weak-coupling regime despite spectral overlap. The energy split of the CL peak is at the order of 36.2 meV, whereas the PL-resolved peak is approximately 24.1 meV, which is due to the collective excitations of multiple emitters per electron excitation and their mutual interactions. Maxwell-Bloch simulations reproduce the experimental spectra and identify the observed splitting as the result of cavity-induced hybridization. Excitation-dependent PL further shows that the hybridized state can be accessed through phonon-assisted excitations below the zero-phonon transition. These results demonstrate that vibronic transitions provide an effective pathway for controlling interactions between multiple quantum emitters in hybrid plasmonic nanophotonic systems.
