Multi-Channel Quantum Dot Single-Photon Sources on a Fiber-Integrated Platform

Abstract

Scalable, reliable quantum light sources are essential for increasing quantum channel capacity and advancing quantum protocols based on photonic qubits. Although recent developments in solid-state quantum emitters have enabled the generation of single photons with high performance, the scalable integration of multiple quantum light sources onto practical optical platforms remains a challenging task. Here, a breakthrough in achieving a multiple, tunable array of quantum photonic devices is presented. An individual device transfer process allows post-characterization and selective integration of multiple single-photon sources onto a V-groove fiber platform. The nanophotonic cavity ensures efficient coupling of single photons into a standard SMF 28 fiber. Moreover, applying an electric field enables a frequency shift of the integrated single-photon device. Therefore, the fiber-integrated quantum platform realizes a scalable and reliable single-photon array within a compact fiber chip at telecom wavelengths.