Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 25: Nano-Optics I
Q 25.9: Vortrag
Dienstag, 1. März 2016, 16:30–16:45, f342
Optical dynamic nuclear spin polarisation in diamond — •Jochen Scheuer1, Ilai Schwartz2, Qiong Chen2, David Schulze-Sünninghausen3, Patrick Carl4, Peter Höfer4, Alexander Retzker5, Hitoshi Sumiya6, Junichi Isoya7, Burkhard Luy3, Martin B. Plenio2, Boris Naydenov1, and Fedor Jelezko1 — 1Institute of Quantum Optics, Ulm University, Germany — 2Institute of Theoretical Physics, Ulm University, Germany — 3Institute of Organic Chemistry and Institute for Biological Interfaces, Karlsruhe Institute of Technology, Germany — 4Bruker BioSpin GmbH, Rheinstetten, Germany — 5Racah Institute of Physics, The Hebrew University of Jerusalem, Israel — 6Sumitomo Electric Industries Ltd., Itami, Japan — 7Research Centre for Knowledge Communities, University of Tsukuba, Japan
The sensitivity of Magnetic Resonance Imaging (MRI) depends critically on nuclear spin polarisation and therefore dynamical nuclear spin polarisation has recently been applied to enhance MRI protocols. 13C nuclear spins in diamond possess uniquely long spin lattice relaxation times. If present in nanodiamods, especially when strongly polarised, they form a promising contrast agent for MRI. Available schemes for achieving hyperpolarization, however, require cryogenic temperatures. We present an efficient scheme that realises 13C nuclear spin hyperpolarisation at room temperature and low magnetic field, which is robust against misalignment. Optical pumping of a Nitrogen-Vacancy (NV) centre creates a continuously renewable electron spin polarisation which can then be transferred to surrounding 13C nuclear spins.