We are proud to announce the publication of a new paper by QPIC1550 consortium members from Wrocław University of Science and Technology (PWR) and Technical University of Denmark (DTU), titled “Xenon plasma-focused ion beam milling for fabrication of high-purity, bright single-photon sources operating in the C-band“ published in Optics Express.
The paper introduces a novel fabrication technique using xenon plasma-focused ion beam (Xe-PFIB) milling to create photonic microstructures incorporating InAs/InP quantum dots. These structures demonstrate bright and highly pure single-photon emission in the telecom C-band (1550 nm), achieving extraction efficiencies up to 24%—a state-of-the-art result for this material system.
This breakthrough provides a cost-effective, scalable method for deterministic fabrication of quantum photonic devices, crucial for advancing quantum communication technologies. Importantly, the study highlights how angled photonic mesa structures significantly enhance photon collection efficiency, paving the way toward more practical, high-performance single-photon sources for real-world quantum networks.
Authors: Maciej Jaworski, Paweł Mrowiński, Marek G. Mikulicz, Paweł Holewa, Laura Zeidler, Marcin Syperek, Elizaveta Semenova, and Grzegorz Sęk.
Congratulations to the team on this important achievement!
