Quantum communications has been the focus of much research in recent years, due to its potential of achieving absolute security for the communication partners. Researchers at the Institute for Solid-State Physics at TU Berlin headed by Prof. Reitzenstein and the group Computational Nanooptics at ZIB now achieved a breakthrough in developing one of the key components in this field – a single photon emitter with very high quantum optic quality. The combination of high photon extraction efficiency, high photon indistinguishability and deterministic manufacturability renders the quantum dot based emitter one of the first truly applicable quantum optic devices.


M. Gschrey, A. Thoma, P. Schnauber, M. Seifried, R. Schmidt, B. Wohlfeil, L. Krüger, J.-H. Schulze, T. Heindel, S. Burger, F. Schmidt, A. Strittmatter, S. Rodt und S. Reitzenstein, Highly indistinguishable photons from deterministic quantum-dot microlenses utilizing 3D in situ electron-beam lithography, Nature Communications, DOI:10.1038/ncomms8662