Single-photon emitters (SPEs) constitute a foundational resource for quantum technologies, including secure communication, photonic quantum computing, and emerging quantum network architectures. A wide range of quantum materials, from atom-like point defects in bulk crystals to excitonic states in low-dimensional semiconductors, now provide bright, coherent, and scalable sources of non-classical light. Meanwhile, advances in photonic integration have enabled efficient routing, filtering, and on-chip manipulation of these emitters. From this perspective, we survey and discuss the technological landscape in which solid-state emitters interface with quantum sensing, quantum communication, quantum computation, and emerging photonic AI platforms. Further, we discuss the materials landscape underpinning modern single-photon sources from the zero-dimensional, one-dimensional, two-dimensional and three-dimensional materials. Lastly, we highlight key integration pathways for these single-photon emitters into scalable quantum photonic systems.
@article{arxiv.2512.14402,
title = {From Atomic Defects to Integrated Photonics: A Perspective on Solid-State Quantum Light Sources},
author = {Anuj Kumar Singh and Parul Sharma and Kishor Kumar Mandal and Lekshmi Eswaramoorthy and Anshuman Kumar},
journal= {arXiv preprint arXiv:2512.14402},
year = {2025}
}