Stray-field NMR imaging and wavelength dependence of optically pumped nuclear spin polarization in InP

1999 ◽  
Vol 60 (12) ◽  
pp. 8672-8679 ◽  
Author(s):  
Carl A. Michal ◽  
Robert Tycko
Keyword(s):  
Spin Polarization ◽  
Nuclear Spin ◽  
Wavelength Dependence ◽  
Nmr Imaging ◽  
Stray Field ◽  
Optically Pumped ◽  
Nuclear Spin Polarization

Optical Nuclear Spin Polarization of Divacancies in SiC

2016 ◽  
Vol 858 ◽  
pp. 287-290
Author(s):  
Viktor Ivády ◽  
Krisztián Szász ◽  
Abram L. Falk ◽  
Paul V. Klimov ◽  
David J. Christle ◽  
...  
Keyword(s):  
Spin Polarization ◽  
Nuclear Spin ◽  
Degree Of Polarization ◽  
Color Centers ◽  
Nuclear Spins ◽  
Spin Coherence ◽  
Optically Pumped ◽  
Nuclear Spin Polarization ◽  
Strongly Coupled ◽  
Insight Into

We demonstrate optically pumped dynamic nuclear polarization (DNP) of 29Si nuclear spins that are strongly coupled to paramagnetic color centers in 4H- and 6H-SiC. We observe 99%±1% degree of polarization. By combining ab initio theory with the experimental identification of the color centers’ optically excited states, we quantitatively model how the polarization derives from hyperfine-mediated level anticrossings. In addition, we developed a general model for these optical DNP processes that allows the effects of many microscopic processes to be integrated. Applying this theory, we gain a deeper insight into dynamic nuclear spin polarization. In particular, our findings show that the defect electron spin coherence times and excited state lifetimes are crucial factors in the entire DNP process. These results lay a foundation for SiC-based quantum memories, nuclear gyroscopes, and hyperpolarized probes for magnetic resonance imaging.

scholarly journals Fast control of nuclear spin polarization in an optically pumped single quantum dot

2011 ◽  
Vol 10 (11) ◽  
pp. 844-848 ◽  
Author(s):  
M. N. Makhonin ◽  
K. V. Kavokin ◽  
P. Senellart ◽  
A. Lemaître ◽  
A. J. Ramsay ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Spin Polarization ◽  
Nuclear Spin ◽  
Single Quantum ◽  
Optically Pumped ◽  
Nuclear Spin Polarization ◽  
Single Quantum Dot ◽  
Fast Control

Dynamical Nuclear Polarization

2018 ◽  
Author(s):  
M. M. Glazov
Keyword(s):  
Spin Polarization ◽  
Nuclear Spin ◽  
Nuclear Polarization ◽  
Magnetic Moments ◽  
Nonlinear Effects ◽  
Many Body ◽  
Nuclear Spin Polarization ◽  
Optical Resonances ◽  
Dynamical Nuclear Polarization ◽  
Temperature Concept

The transfer of nonequilibrium spin polarization between the electron and nuclear subsystems is studied in detail. Usually, a thermal orientation of nuclei in magnetic field is negligible due to their small magnetic moments, but if electron spins are optically oriented, efficient nuclear spin polarization can occur. The microscopic approach to the dynamical nuclear polarization effect based on the kinetic equation method, along with a phenomenological but very powerful description of dynamical nuclear polarization in terms of the nuclear spin temperature concept is given. In this way, one can account for the interaction between neighbouring nuclei without solving a complex many-body problem. The hyperfine interaction also induces the feedback of polarized nuclei on the electron spin system giving rise to a number of nonlinear effects: bistability of nuclear spin polarization and anomalous Hanle effect, dragging and locking of optical resonances in quantum dots. Theory is illustrated by experimental data on dynamical nuclear polarization.

scholarly journals Dynamics of nuclear spin polarization induced and detected by coherently precessing electron spins in fluorine-doped ZnSe

2016 ◽  
Vol 93 (8) ◽  
Author(s):  
F. Heisterkamp ◽  
E. Kirstein ◽  
A. Greilich ◽  
E. A. Zhukov ◽  
T. Kazimierczuk ◽  
...  
Keyword(s):  
Spin Polarization ◽  
Nuclear Spin ◽  
Electron Spins ◽  
Nuclear Spin Polarization

Magnetic field dependence of fluorine-19 nuclear spin polarization. The system tetrafluorobenzoquinone-tetrafluorohydroquinone

1982 ◽  
Vol 104 (22) ◽  
pp. 5878-5883 ◽  
Author(s):  
Richard S. Hutton ◽  
Heinz D. Roth ◽  
Marcia L. Manion Schilling ◽  
Anthony M. Trozzolo ◽  
Thomas M. Leslie
Keyword(s):  
Magnetic Field ◽  
Spin Polarization ◽  
Field Dependence ◽  
Nuclear Spin ◽  
Magnetic Field Dependence ◽  
Nuclear Spin Polarization

Effective collinear optical pumping for nuclear spin polarization

2014 ◽  
Vol 31 (10) ◽  
pp. 2278 ◽  
Author(s):  
Sung Jong Park ◽  
Taeksu Shin ◽  
Ju Hahn Lee ◽  
Gi Dong Kim ◽  
Yong Kyun Kim
Keyword(s):  
Spin Polarization ◽  
Nuclear Spin ◽  
Optical Pumping ◽  
Nuclear Spin Polarization
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