Engineering the coupling between fundamental quantum excitations is at the heart of quantum science and technologies. An outstanding case is the creation of quantum light sources in which coupling between single photons and phonons can be controlled and harnessed to enable quantum information transduction. Here we report the deterministic creation of quantum emitters featuring highly tunable coupling between excitons and phonons. The quantum emitters are formed in strain-induced quantum dots created in homobilayer WSe₂. The colocalization of quantum-confined interlayer excitons and terahertz interlayer breathing-mode phonons, which directly modulates the exciton energy, leads to a uniquely strong phonon coupling to single-photon emission, with a Huang–Rhys factor reaching up to 6.3. The single-photon spectrum of interlayer exciton emission features a single-photon purity >83% and multiple phonon replicas, each heralding the creation of a phonon Fock state in the quantum emitter. Due to the vertical dipole moment of the interlayer exciton, the phonon–photon interaction is electrically tunable to be higher than the exciton and phonon decoherence rate, and hence promises to reach the strong-coupling regime. Our result demonstrates a solid-state quantum excitonic–optomechanical system at the atomic interface of the WSe₂ bilayer that emits flying photonic qubits coupled with stationary phonons, which could be exploited for quantum transduction and interconnection.

设计基本量子激发之间的耦合是量子科学和技术的核心。一个突出的例子是量子光源的创建，其中可以控制和利用单光子和声子之间的耦合来实现量子信息转换。在这里，我们报告了量子发射器的确定性创建，其特点是激子和声子之间的高度可调耦合。量子发射器形成于同质双层WSe ₂中创建的应变诱导量子点中。量子限制层间激子和太赫兹层间呼吸模式声子的共定位直接调制激子能量，导致与单光子发射的独特强声子耦合，黄-里斯因子高达6.3。层间激子发射的单光子光谱具有单光子纯度>83%和多个声子复制品，每个复制品都预示着量子发射器中声子福克态的产生。由于层间激子的垂直偶极矩，声子-光子相互作用可通过电调节高于激子和声子退相干率，因此有望达到强耦合状态。_{我们的结果展示了 WSe 2}双层原子界面处的固态量子激子光机械系统，该系统发射与固定声子耦合的飞行光子量子位，可用于量子转导和互连。