Prof. Schröder entwickelt Quantentechnologien auf Basis von Farbzentren in Diamant und Silizium für sichere Quantenkommunikation und hochpräzise Sensoren. Sein aktueller Fokus liegt auf der Realisierung von Quantenwiederholern — Systemen, die Quanteninformation über lange Glasfaserstrecken verteilen — sowie auf der Integration dieser Farbzentren in photonische Strukturen für effiziente Spin-Photon-Schnittstellen. Parallel entwickelt er Quantenelektrometer, die einzelne Ladungen im Kristallgitter mit atomarer Auflösung detektieren und damit neue Möglichkeiten für Materialwissenschaft und medizinische Diagnostik eröffnen. Die Arbeiten adressieren zentrale Anforderungen für zukünftige Quantennetzwerke und könnten Anwendungen in abhörsicherer Kommunikation, Präzisionsmessung und biomedizinischer Bildgebung ermöglichen.
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Prof. Dr. Tim Schröder
HU-FIS-Profil ↗EQUAL - Erbium-based silicon quantum light sources
university
EQUAL - Erbium-based silicon quantum light sources
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Technologien und Demonstratoren für Quantenrepeater, TD.QR, Teilprojekt: 3-Knoten-Verschränkung von Quanten- speichern über eine 52km Telekomfaserverbindung
university
Förderer: Bundesministerium für Forschung, Technologie und Raumfahrt Zeitraum: 10/2018 - 09/2025 Projektleitung: Prof. Dr. Tim Schröder
Förderer: Horizon 2020: ERC Starting Grant Zeitraum: 12/2020 - 11/2025 Projektleitung: Prof. Dr. Tim Schröder
Förderer: Öffentliche Förderorganisationen anderer Länder Zeitraum: 04/2025 - 03/2030 Projektleitung: Prof. Dr. Tim Schröder
Journal of the Optical Society of America B · DOI
The past two decades have seen great advances in developing color centers in diamond for sensing, quantum information processing, and tests of quantum foundations. Increasingly, the success of these applications as well as fundamental investigations of light–matter interaction depend on improved control of optical interactions with color centers—from better fluorescence collection to efficient and precise coupling with confined single optical modes. Wide ranging research efforts have been undertaken to address these demands through advanced nanofabrication of diamond. This review will cover recent advances in diamond nano- and microphotonic structures for efficient light collection, color center to nanocavity coupling, hybrid integration of diamond devices with other material systems, and the wide range of fabrication methods that have enabled these complex photonic diamond systems.
Nature Communications · DOI
The controlled creation of defect centre-nanocavity systems is one of the outstanding challenges for efficiently interfacing spin quantum memories with photons for photon-based entanglement operations in a quantum network. Here we demonstrate direct, maskless creation of atom-like single silicon vacancy (SiV) centres in diamond nanostructures via focused ion beam implantation with ∼32 nm lateral precision and <50 nm positioning accuracy relative to a nanocavity. We determine the Si+ ion to SiV centre conversion yield to be ∼2.5% and observe a 10-fold conversion yield increase by additional electron irradiation. Low-temperature spectroscopy reveals inhomogeneously broadened ensemble emission linewidths of ∼51 GHz and close to lifetime-limited single-emitter transition linewidths down to 126±13 MHz corresponding to ∼1.4 times the natural linewidth. This method for the targeted generation of nearly transform-limited quantum emitters should facilitate the development of scalable solid-state quantum information processors.
Nano Letters · DOI
Efficient collection of the broadband fluorescence from the diamond nitrogen vacancy (NV) center is essential for a range of applications in sensing, on-demand single photon generation, and quantum information processing. Here, we introduce a circular "bullseye" diamond grating which enables a collected photon rate of (2.7 ± 0.09) × 10(6) counts per second from a single NV with a spin coherence time of 1.7 ± 0.1 ms. Back-focal-plane studies indicate efficient redistribution of the NV photoluminescence into low-NA modes by the bullseye grating.