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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-4871
DTSTART:20181115T160000Z
DURATION:PT1H0M0S
DTSTAMP:20260314T235709Z
LAST-MODIFIED:20181112T200127Z
LOCATION:5310 Chamberlin Hall
SUMMARY:Optically-pumped dynamic nuclear polarization under ambient co
 nditions via nitrogen-vacancy centers in diamond\, R. G. Herb Condense
 d Matter Seminar\, Prof. Carlos Meriles\, City College of New York
DESCRIPTION:A broad effort is underway to improve the sensitivity of n
 uclear magnetic resonance through the use of dynamic nuclear polarizat
 ion. Nitrogen-vacancy (NV) centers in diamond offer an appealing platf
 orm because these paramagnetic defects can be optically polarized effi
 ciently at room temperature. This presentation surveys alternative NV-
 based 13C spin polarization protocols\, with emphasis on recent scheme
 s designed for powder geometries. Through experimental\, analytical\, 
 and numerical work\, we show that 13C spins polarize efficiently for v
 irtually all orientations of the NV axis relative to the applied magne
 tic field and over a broad range of hyperfine couplings. We will also 
 discuss the mechanics of the polarization of 13C spins through the int
 eraction of the NV with other ‘proxy’ paramagnetic defects\, with 
 attention to the interplay that emerges between spin cross-relaxation 
 and mechanical rotation of the crystal as a whole.
URL:https://www.physics.wisc.edu/events/?id=4871
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