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Physical insights from a penetration depth model of optically pumped NMR

J. Chem. Phys. 128, 052303 (2008); doi:10.1063/1.2831928

Published 23 January 2008

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Stacy Mui, Kannan Ramaswamy, and Sophia E. Hayes
Department of Chemistry and Center for Materials Innovation, Washington University, St. Louis, Missouri 63130, USA
A model of optically pumped NMR (OPNMR) behavior in GaAs that connects the photon energy dependence of the OPNMR signal intensity for 69Ga with different polarizations of light has been developed. Inputs to this model include experimental conditions—external magnetic field (B0), temperature (T), and optical pumping parameters (tauL, laser helicity)—as well as parameters that arise from sample-specific characteristics—electron spin lifetime (T1e), electron lifetime (taue), electron-nuclear correlation time (tauc), and sample thickness (z). These various inputs affect the profile of the OPNMR signal intensity as a function of photon energy (E) in a predictable manner. Therefore, the profile can serve as a composite fingerprint by which individual parameters can be inferred when not known. Characteristics of the profile include the photon energy for maximum OPNMR signal intensity and the intensity ratio between sigma+ and sigma− light. ©2008 American Institute of Physics
History: Received 24 September 2007; accepted 14 December 2007; published 23 January 2008
Permalink: http://link.aip.org/link/?JCPSA6/128/052303/1
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KEYWORDS and PACS

Keywords
PACS
  • 76.60.-k
    Nuclear magnetic resonance and relaxation (condensed matter)
  • 76.70.Fz
    Double nuclear magnetic resonance (DNMR) (condensed matter)
  • YEAR: 2008

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0021-9606 (print)   1089-7690 (online)
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