(411c) Single-Particle Manufacturing Methods for Colloidal Materials

Spins in nanocrystals and defects in wide-bandgap semiconductors have emerged as promising platforms for quantum information applications. Prototypical examples include carriers in III-V nanocrystals and nitrogen-vacancy centers in diamond. Optically initializing, manipulating, reading out, and transmitting spin states from these materials with high fidelity will form the basis of new quantum technologies, including quantum repeaters, qubits, and sensors. However, accomplishing these operations with the necessary fidelity requires precisely constructed waveguides and deterministic positioning of qubits with < 100 nm³ precision. Existing manufacturing methods including ion implantation and printing fall far short of these goals.

Here, we present two new manufacturing methods to enable deterministic positioning quantum materials and waveguides. The methodology is widely applicable to colloidal materials. We assess the achievable precision in different conditions and investigate the coherence properties of single-photon emitters positioned with these techniques. These measurements validate the manufacturing method, highlighting a new approach for quantum devices based on colloidal nanomaterials.