Bulk Nuclear Polarization Enhanced at Room Temperature by Optical Pumping

Ran Fischer, Christian O. Bretschneider, Paz London, Dmitry Budker, David Gershoni, and Lucio Frydman
Phys. Rev. Lett. 111, 057601 – Published 31 July 2013
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Abstract

Bulk C13 polarization can be strongly enhanced in diamond at room temperature based on the optical pumping of nitrogen-vacancy color centers. This effect was confirmed by irradiating single crystals at a 50mT field promoting anticrossings between electronic excited-state levels, followed by shuttling of the sample into an NMR setup and by subsequent C13 detection. A nuclear polarization of 0.5%—equivalent to the C13 polarization achievable by thermal polarization at room temperature at fields of 2000T—was measured, and its bulk nature determined based on line shape and relaxation measurements. Positive and negative enhanced polarizations were obtained, with a generally complex but predictable dependence on the magnetic field during optical pumping. Owing to its simplicity, this C13 room temperature polarizing strategy provides a promising new addition to existing nuclear hyperpolarization techniques.

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  • Received 25 November 2012

DOI:https://doi.org/10.1103/PhysRevLett.111.057601

© 2013 American Physical Society

Authors & Affiliations

Ran Fischer1, Christian O. Bretschneider2, Paz London1, Dmitry Budker3,4, David Gershoni1, and Lucio Frydman2,*

  • 1Department of Physics, Technion, Israel Institute of Technology, Haifa 32000, Israel
  • 2Department of Chemical Physics, Weizmann Institute of Science, Rehovot 76100, Israel
  • 3Department of Physics, University of California, Berkeley, California 94720-7300, USA
  • 4Nuclear Science Division, Lawrence Berkeley National Laboratory, California 94720, USA

  • *lucio.frydman@weizmann.ac.il

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Issue

Vol. 111, Iss. 5 — 2 August 2013

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