Fiber-coupled, on-demand single-photon source

Important results from the project

The project demonstrated high-performance nanowire quantum dot emitters, including high purity, high photon indistinguishability and high entanglement fidelity. Several fiber-integration methods were developed and evaluated. Although emission from fully integrated fiber prototypes was not achieved, the project identified key technical challenges and generated valuable knowledge that will guide future development of scalable fiber-based quantum light sources.

Expected long term effects

The project is expected to contribute to the long-term development of scalable fiber-integrated quantum light sources by clarifying key technical challenges and viable integration strategies. The knowledge gained will reduce risk in future projects, support improved co-design of emitters and fiber interfaces, and strengthen international research collaboration in quantum photonics.

Approach and implementation

The project was largely carried out as planned. Work began with optical characterization of nanowire quantum dots, demonstrating photon indistinguishability and entanglement. In parallel, methods for fiber integration were developed. Several prototypes were fabricated, optical measurements were performed, and the fabrication and integration processes were iteratively refined based on the experimental outcomes.