Microwave to Optical Transducer with Single NV Centers

In this work we aim to develop a quantum interface between microwave and optical photons. This is an essential component in realising a hybrid quantum network where information needs to be efficiently interfaced between superconducting microwave circuits, for quantum information processing, and optical photons, for communication and memories.  Our work investigates the potential of micro-fabricated devices with integrated optical and microwave cavities that use individual three-level solid-state emitters, such as NV centres, for the efficient conversion between the microwave and optical regimes. We present analytical and numerical simulation results that explore the required characteristics of the microwave and optical cavities to achieve high conversion efficiency between the microwave and optical regimes.