论文标题
在电流纳米腔中控制单个稀土离子发射
Controlling single rare earth ion emission in an electro-optical nanocavity
论文作者
论文摘要
稀土发射器可以实现关键的量子资源，包括自旋量子，单个光子源和量子记忆。然而，由于其4F内部光学转变的发射率较低，因此对单个离子的探测仍然具有挑战性。一种可行的方法是通过purcell增强光腔的发射。实时调节空腔离子耦合的能力将进一步提高此类系统的能力。在这里，我们通过将Erbium掺杂剂嵌入从薄膜硅锂构成的电活性光子晶体腔中直接控制单个离子发射。超过170的purcell因子可以实现单个离子检测，这通过二阶自相关测量得到验证。通过利用谐振频率的电声调来实现发射速率的动态控制。使用此功能，进一步证明了单个离子激发的存储和检索，而不会扰动发射特性。这些结果有助于可控的单光子源和有效的自旋光子接口的新机会。
Rare earth emitters enable critical quantum resources including spin qubits, single photon sources, and quantum memories. Yet, probing of single ions remains challenging due to low emission rate of their intra-4f optical transitions. One feasible approach is through Purcell enhanced emission in optical cavities. The ability to modulate cavity-ion coupling in real time will further elevate the capacity of such systems. Here, we demonstrate direct control of single ion emission by embedding erbium dopants in an electro-optically active photonic crystal cavity patterned from thin-film lithium niobate. Purcell factor over 170 enables single ion detection, which is verified by second-order autocorrelation measurement. Dynamic control of emission rate is realized by leveraging electro-optic tuning of resonance frequency. Using this feature, storage and retrieval of single ion excitation is further demonstrated, without perturbing the emission characteristics. These results promise new opportunities for controllable single photon sources and efficient spin-photon interfaces.
