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

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.

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

Nature Materials ◽

10.1038/nmat3102 ◽

2011 ◽

Vol 10 (11) ◽

pp. 844-848 ◽

Cited By ~ 27

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

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Minireview on Nuclear Spin Polarization in Optically-Pumped Diamond Nitrogen Vacancy Centers

Journal of the Korean Magnetic Resonance Society ◽

10.6564/jkmrs.2016.20.4.114 ◽

2016 ◽

Vol 20 (4) ◽

pp. 114-120

Author(s):

Keunhong Jeong

Keyword(s):

Spin Polarization ◽

Nuclear Spin ◽

Nitrogen Vacancy ◽

Optically Pumped ◽

Nuclear Spin Polarization ◽

Nitrogen Vacancy Centers

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Nuclear Spin Polarization Transfer with a Single Radio-Frequency Field in Optically Pumped Indium Phosphide

Physical Review Letters ◽

10.1103/physrevlett.81.3988 ◽

1998 ◽

Vol 81 (18) ◽

pp. 3988-3991 ◽

Cited By ~ 28

Author(s):

Carl A. Michal ◽

Robert Tycko

Keyword(s):

Indium Phosphide ◽

Radio Frequency ◽

Spin Polarization ◽

Nuclear Spin ◽

Polarization Transfer ◽

Optically Pumped ◽

Nuclear Spin Polarization ◽

Radio Frequency Field ◽

Frequency Field ◽

Single Radio

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Dynamical Nuclear Polarization

10.1093/oso/9780198807308.003.0005 ◽

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.

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