Fibre-Coupled GaSb Quantum Dot Tunable Single-Photon Sources for Field Deployed Quantum Key Distribution

Project funded by Swedish Research Council (Project grant), grant 2023-05663_VR. Participating organisations named by the source: KTH, Royal Institute of Technology. Funded amount: SEK 4,500,000, as stated by the source. Runs 2024-01-01 to 2026-12-31. Keywords: Naturvetenskap, Natural Sciences, Fysik, Physical Sciences, Atom- och molekylfysik och optik, Atom and Molecular Physics and Optics. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2025-12-06); national funding data, not CORDIS. Abstract given by the source: Within the FiGAnti project we will explore a new material system for non-classical light sources operating in the telecom bands - Antimony-based QDs. The main goal of the project is to deploy single photons from a telecom (In)GaSb/AlGaSb QD device in an existing deployed fibre link for QKD demonstration. To achieve this goal, we will first understand the fundamental properties of the material and explore various photonic structures (circular Bragg resonators and photonic nanowire cavities) to engineer the SPS properties. The practical relevance of our SPSs will be increased by including strain-tuning of their emission energy, charge stabilisation and fibre pigtailing to obtain identical, scalable, compact and robust sources. Our testbed will allow us to optimise the exact transmission wavelength in view of trade-off between transmission loss and noise, and to determine the best achievable parameters using the proposed material platform. QD-based SPS will be benchmarked against commercial decoy state and discrete/continuous-variable QKD solutions.

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of Swedish Research Council. Retrieved 2026-10-22. Licence: Creative Commons Attribution 4.0 (OpenAIRE Graph). Selected metadata, adapted presentation; the publisher's record is authoritative. No endorsement by the source is implied. Licence: Creative Commons Attribution 4.0 (CC BY 4.0).

AI-assisted summary: The project "Fibre-Coupled GaSb Quantum Dot Tunable Single-Photon Sources for Field Deployed Quantum Key Distribution" is funded by the Swedish Research Council with SEK 4,500,000, running from January 2024 to December 2026, involving KTH, Royal Institute of Technology. Suggested technology pillar: communication. Generated by AI from the public source text; it may contain errors and the original source is authoritative.