A target whispering-gallery-mode microresonator (WGMM) directly coupled to a waveguide with an auxiliary side-coupled WGMM is proposed to deterministically extract both the resonant and non-resonant single incident photons from a waveguide. Based on the single-photon Raman interaction (SPRINT) between an Λ-type three-level atom and the target WGMM, a full quantum theory in real space is adopted to calculate the extraction efficiencies at the single-photon level. The results show that the extraction efficiencies can be significantly improved by appropriately tuning the frequencies of the auxiliary WGMM and the coupling strength between the two WGMMs, even when the atom and WGMMs have dissipations. Since mode redistribution is only externally imposed on the auxiliary WGMM, the population and phase of the atom are not directly affected. The nonlocal control, which ensures that the SPRINT takes place, results in high extraction efficiencies. We also find that the transmission probabilities of both the resonant and non-resonant incident photons can be controlled in a range from 0 to 100%, so that the proposed double-WGMM system has the potential to be used as a single-photon switch.

提出了一种目标耳语画廊模式微谐振器（WGMM），该目标与辅助侧耦合WGMM直接耦合到波导，以确定性地从波导中提取谐振和非谐振单入射光子。基于Λ型三能级原子与目标WGMM之间的单光子拉曼相互作用（SPRINT），采用实空间的全量子理论计算单光子能级的提取效率。结果表明，即使原子和WGMM耗散，通过适当地调整辅助WGMM的频率和两个WGMM之间的耦合强度，也可以显着提高提取效率。由于模式重新分配仅从外部施加在辅助WGMM上，因此原子的总体和相位不会受到直接影响。确保SPRINT发生的非本地控制可提高提取效率。我们还发现，谐振和非谐振入射光子的传输概率都可以控制在0％到100％的范围内，因此所提出的double-WGMM系统具有用作单光子开关的潜力。