Fiber-coupled, on-demand single-photon source

Purpose and goal:

The aim of the project is to develop a fiber-coupled, on-demand source of single-photons emitting at telecom wavelengths. The device is based on quantum dots embedded within a nanowires and integrated directly inside the core of a pre-machined optical fiber. Our goal is to build a scalable, compact, and reliable single-photon source with high performance in terms of brightness, purity, and indistinguishability, ultimately facilitating advancements in quantum technologies

Expected results and effects:

The expected results include build the first prototype of the single-photon source. The prototype is expected to achieve a count rate above 1 MHz, purity over 90%, and photon indistinguishability with post-selected visibility over 90%. With such performance, this device can be utilized for a wide range of quantum applications, such as quantum communication and computing applications.

Approach and implementation:

The project will be executed in three phases: Prototype Development, where the fully integrated, fiber-coupled single-photon device will be created; Testing and Validation, involving the characterization of the device´s optical properties and optimization of the integration process, which will be carried out in cooperation with Quantum Scopes AB; and Quantum Communication Demonstration, where the device will be used to demonstrate quantum communication protocols in collaboration with industry partners, including real-world testing using deployed optical fibers.