Deterministic Quantum Light Arrays from Giant Silica-Shelled Quantum Dots

Colloidal quantum dot (QD) single-photon sources are important for their applications in photonic quantum information technologies. To fully realize their potential applications, scalable deterministic placement of stable single QD emitters is required. In this work, we synthetically increase the QD size via silica encapsulation to facilitate deterministic positioning of single QDs into large arrays while maintaining their photostability and single-photon emission properties. By using different integration methods including template-assisted self-assembly and inkjet printing, giant silica-shelled QDs can be precisely positioned into order arrays with high yield. Finally, second order photon correlation measurements are used to confirm their single-photon emission. This work shows that giant silica-shelled QDs are a flexible class of materials that may be compatible with other device fabrication techniques to achieve deterministic single particle positioning in complex quantum photonic platforms.