Research Group Hunger
Our group is exploring optically addressable spins in condensed matter and the enhancement of light-matter interactions with microcavities. We are interested in the fields of solid state quantum optics, optical sensing, microscopy, spectroscopy, and spin physics.
Enhanced light-matter interactions allow one to realize efficient optical interfaces at the single quantum level, and enable novel schemes for spectroscopy and sensing. We employ and further develop fiber-based Fabry-Perot microcavities, which combine microscopic mode volumes with exceptionally high quality factors, and at the same time offer open access for a variety of samples. We use this highly flexible platform e.g. to realize a coherent spin-photon interface for color centers in diamond, to read out and control few or even individual rare earth ions as qubits, and to perform cavity-enhanced sensing and spectroscopy of nanosystems also in liquid environments.
News
- 04/26 EIC Pathfinder Project Superspin to connect superconducting qubits with spin memories starts.
- 03/26: First observation of optically detected nuclear magnetic resonance in a molecular complex published in Nature Materials
- 03/26: High-fidelity control of a nuclear spin coupled to an SnV center in diamond published in PRX
- 07/25: We offer two PhD projects within Gen-Q, application deadline 31.8.25!
- 01/25: We have inaugurated a fiber test bed for quantum communication
- 08/24: We have achieved record-long spin coherence in SnV centers in diamond, driven by a superconducting waveguide - see paper in PRX
- 11/23: We have observed collective effects from NV centers coupled to a microcavity - see preprint on arxiv.
- 04/23: We have realized an ultra-stable cryogenic nanopositioning platform which achieves picometer-scale stability for an open Fabry-Perot cavity in a closed-cycle cryostat - see paper in APL Photonics
- 12/22: Summary article on scanning cavity microscopy published in Imaging&Microscopy