7.05T下金刚石中光泵浦(13)C NMR的现象学：室温极化、取向依赖性以及缺陷浓度对极化动力学的影响。
The phenomenology of optically pumped (13)C NMR in diamond at 7.05T: Room temperature polarization, orientation dependence, and the effect of defect concentration on polarization dynamics.
作者信息
Scott Eric, Drake Melanie, Reimer Jeffrey A
机构信息
Department of Chemistry, University of California, Berkeley, USA.
Department of Chemical & Biomolecular Engineering, University of California, Berkeley, Berkeley, CA 94720, USA.
出版信息
J Magn Reson. 2016 Mar;264:154-162. doi: 10.1016/j.jmr.2016.01.001.
Room temperature optical illumination of NV- imbibed single crystal diamonds with a 532 nm laser produces (13)C polarization enhancements up to 200 times greater than that of the thermal equilibrium value at 7.05 T. We report high field NV- mediated (13)C polarization as a function of the number and type (NV- and P1) of defects in commercially available diamonds. Surprisingly, both positive and negative (13)C polarizations are observed depending on the orientation of the crystal with respect to the external magnetic field and the electric field vector of the optical illumination. The data reported herein cannot be explained by a previously proposed mechanism.
用532纳米激光对注入氮空位（NV）的单晶金刚石进行室温光学照射，可使（13）C极化增强，增强幅度比7.05特斯拉时的热平衡值高出200倍。我们报告了高场氮空位介导的（13）C极化与市售金刚石中缺陷数量和类型（氮空位和P1）的函数关系。令人惊讶的是，根据晶体相对于外部磁场和光学照射电场矢量的取向，观察到了正的和负的（13）C极化。本文报告的数据无法用先前提出的机制来解释。
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