Phys. Rev. Lett. 81, 3988–3991 (1998)Nuclear Spin Polarization Transfer with a Single Radio-Frequency Field in Optically Pumped Indium PhosphideReceived 23 April 1998; published in the issue dated 2 November 1998 We describe a novel spin polarization transfer phenomenon observed in high-field, optically pumped NMR experiments on single-crystal indium phosphide. Polarization transfer from 115In spins to 31P spins occurs when a weak radio-frequency field is applied at the 31P NMR frequency. Unlike other known high-field polarization transfer effects, no rf field near the 115In frequency is required. We present evidence that the 31P polarization arises from a state of optically pumped dipolar order in the 115In spin system and propose two mechanisms that may contribute to the creation of this state. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.3988
DOI:
10.1103/PhysRevLett.81.3988
PACS:
76.70.Fz, 32.80.Bx, 61.18.Fs
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