Selective addressing of solid-state spins with an integrated device

Solid-state spins have emerged as one of the most promising platforms for quantum sensing and information processing. A high level of integration and miniaturization of quantum devices is required for practical and scalable applications. This limits the flexibility of spin manipulation and detection. In this work, we demonstrate the spatially selective manipulation of spin defects in diamond with a compact device. A tapered fiber–Ag nanowire–electrodes hybrid structure is fabricated to transmit an optical and electrical driving field. The polarization-dependent mode distribution is analyzed and subsequently utilized to optically excite spin defects. Combined with microwave pumping through the same device, we demonstrate the selective manipulation of spin defects at different positions without changing the physical architecture of the device. Our work provides a new scheme for developing integrated quantum sensors with high flexibility.