Phys. Rev. Lett. 102, 027601 (2009) [4 pages]Fast Nuclear Spin Hyperpolarization of Phosphorus in SiliconReceived 20 June 2008; revised 24 October 2008; published 13 January 2009 We experimentally demonstrate a method for obtaining nuclear spin hyperpolarization, that is, polarization significantly in excess of that expected at thermal equilibrium. By exploiting a nonequilibrium Overhauser process, driven by white light irradiation, we obtain more than 68% negative nuclear polarization of phosphorus donors in silicon. This polarization is reached with a time constant of ∼150 sec, at a temperature of 1.37 K and a magnetic field of 8.5 T. The ability to obtain such large polarizations is discussed with regards to its significance for quantum information processing and magnetic resonance imaging. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.027601
DOI:
10.1103/PhysRevLett.102.027601
PACS:
76.90.+d, 61.72.uf, 76.30.−v
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