Prof. Dr. Tim Schröder

Die Forschung konzentriert sich auf die Entwicklung photonisch integrierter Quantentechnologien, insbesondere Quantenspeicher und Quantenrepeater für sichere Kommunikation über große Distanzen. Ein zentrales Material sind Farbzentren in Diamant (z. B. NV- und SnV-Zentren), die mit nanophotonischen Strukturen kombiniert werden, um effiziente Spin-Photon-Schnittstellen zu realisieren. Zusätzlich werden Quantensensoren für elektromagnetische Felder und magnetische Abbildung auf Chip-Ebene entwickelt. Die Arbeit umfasst sowohl theoretische Modellierung und Simulation als auch experimentelle Charakterisierung von Nanostrukturen und Halbleitersystemen.

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• Diamant-Nanophotonik für On-Chip Quantentechnologie (DiNOQuant)

  Quelle ↗

  Förderer: Bundesministerium für Forschung, Technologie und Raumfahrt Zeitraum: 10/2018 - 09/2025 Projektleitung: Prof. Dr. Tim Schröder

• Quantum Repeater Architectures Based on Quantum Memories and Photonic Encoding (QUREP)

  Quelle ↗

  Förderer: Horizon 2020: ERC Starting Grant Zeitraum: 12/2020 - 11/2025 Projektleitung: Prof. Dr. Tim Schröder

• EQUAL - Erbium-based silicon quantum light sources

  Quelle ↗

  Förderer: Öffentliche Förderorganisationen anderer Länder Zeitraum: 04/2025 - 03/2030 Projektleitung: Prof. Dr. Tim Schröder

• Quantum nanophotonics in diamond [Invited]

  2016

  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.

• Scalable focused ion beam creation of nearly lifetime-limited single quantum emitters in diamond nanostructures

  2017

  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.