scholarly journals Dynamic nuclear polarization in InGaAs/GaAs and GaAs/AlGaAs quantum dots under nonresonant ultralow-power optical excitation

2013 ◽  
Vol 88 (4) ◽  
Author(s):  
J. Puebla ◽  
E. A. Chekhovich ◽  
M. Hopkinson ◽  
P. Senellart ◽  
A. Lemaitre ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Optical Excitation ◽  
Ultralow Power

scholarly journals Dynamic Nuclear Polarization in Double Quantum Dots

2010 ◽  
Vol 104 (22) ◽  
Author(s):  
M. Gullans ◽  
J. J. Krich ◽  
J. M. Taylor ◽  
H. Bluhm ◽  
B. I. Halperin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Double Quantum ◽  
Double Quantum Dots

scholarly journals Structure of Colloidal Quantum Dots from Dynamic Nuclear Polarization Surface Enhanced NMR Spectroscopy

2015 ◽  
Vol 137 (43) ◽  
pp. 13964-13971 ◽  
Author(s):  
Laura Piveteau ◽  
Ta-Chung Ong ◽  
Aaron J. Rossini ◽  
Lyndon Emsley ◽  
Christophe Copéret ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Nmr Spectroscopy ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Colloidal Quantum Dots ◽  
Surface Enhanced

scholarly journals Carbon-13 dynamic nuclear polarization in diamond via a microwave-free integrated cross effect

2019 ◽  
Vol 116 (37) ◽  
pp. 18334-18340
Author(s):  
Jacob Henshaw ◽  
Daniela Pagliero ◽  
Pablo R. Zangara ◽  
María B. Franzoni ◽  
Ashok Ajoy ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Dynamic Nuclear Polarization ◽  
Color Center ◽  
Nuclear Polarization ◽  
Optical Excitation ◽  
Zeeman Splitting ◽  
Nitrogen Vacancy ◽  
Field Dynamic ◽  
Diamond Powders ◽  
Promising Source

Color-center–hosting semiconductors are emerging as promising source materials for low-field dynamic nuclear polarization (DNP) at or near room temperature, but hyperfine broadening, susceptibility to magnetic field heterogeneity, and nuclear spin relaxation induced by other paramagnetic defects set practical constraints difficult to circumvent. Here, we explore an alternate route to color-center–assisted DNP using nitrogen-vacancy (NV) centers in diamond coupled to substitutional nitrogen impurities, the so-called P1 centers. Working near the level anticrossing condition—where the P1 Zeeman splitting matches one of the NV spin transitions—we demonstrate efficient microwave-free13C DNP through the use of consecutive magnetic field sweeps and continuous optical excitation. The amplitude and sign of the polarization can be controlled by adjusting the low-to-high and high-to-low magnetic field sweep rates in each cycle so that one is much faster than the other. By comparing the13C DNP response for different crystal orientations, we show that the process is robust to magnetic field/NV misalignment, a feature that makes the present technique suitable to diamond powders and settings where the field is heterogeneous. Applications to shallow NVs could capitalize on the greater physical proximity between surface paramagnetic defects and outer nuclei to efficiently polarize target samples in contact with the diamond crystal.

scholarly journals Theory of coherent dynamic nuclear polarization in quantum dots

2014 ◽  
Vol 89 (8) ◽  
Author(s):  
Izhar Neder ◽  
Mark S. Rudner ◽  
Bertrand I. Halperin
Keyword(s):  
Quantum Dots ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization

scholarly journals Resolving the Core and the Surface of CdSe Quantum Dots and Nanoplatelets Using Dynamic Nuclear Polarization Enhanced PASS–PIETA NMR Spectroscopy

2018 ◽  
Vol 4 (9) ◽  
pp. 1113-1125 ◽  
Author(s):  
Laura Piveteau ◽  
Ta-Chung Ong ◽  
Brennan J. Walder ◽  
Dmitry N. Dirin ◽  
Daniele Moscheni ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Nmr Spectroscopy ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Cdse Quantum Dots ◽  
The Core
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