scholarly journals Optical pumping and reversal of hole spin in InAs/GaAs quantum dots

2012 ◽  
Vol 100 (1) ◽  
pp. 012104 ◽  
Author(s):  
F. Fras ◽  
B. Eble ◽  
F. Bernardot ◽  
C. Testelin ◽  
M. Chamarro ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Pumping

scholarly journals Random population model to explain the recombination dynamics in single InAs/GaAs quantum dots under selective optical pumping

2011 ◽  
Vol 13 (2) ◽  
pp. 023022 ◽  
Author(s):  
Jordi Gomis-Bresco ◽  
Guillermo Muñoz-Matutano ◽  
Juan Martínez-Pastor ◽  
Benito Alén ◽  
Luca Seravalli ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Population Model ◽  
Optical Pumping ◽  
Recombination Dynamics

Optical Nmr From Single Quantum Dots

1996 ◽  
Vol 442 ◽  
Author(s):  
S. W. Brown ◽  
T. A. Kennedy ◽  
D. Gammon
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Quantum Wells ◽  
Optical Pumping ◽  
Nuclear Orientation ◽  
Energy Levels ◽  
Zeeman Splitting ◽  
Single Quantum ◽  
Interface Fluctuations ◽  
20 Nm

AbstractWe have observed nuclear magnetic resonance (NMR) signatures from constituent Ga and As nuclei in single GaAs quantum dots formed by interface fluctuations in GaAs/AlGaAs quantum wells. Orientation of the nuclear spin system by optical pumping causes an Overhauser shift in the excitonic energy levels proportional to the degree of nuclear orientation. NMR was detected by monitoring changes in the combined Overhauser plus Zeeman splitting of an exciton localized in a single quantum dot as the RF frequency was swept through a nuclear resonance. The NMR signals originate from ∼105 nuclei in the quantum dot — (20 nm)3 volume - representing an increase in sensitivity of five orders of magnitude over previous optical NMR measurements and thirteen orders of magnitude over conventional NMR. The data were fit to Lorentzian lineshapes, giving 75As linewidths on the order of 20 kHz.

scholarly journals Optical pumping as artificial doping in quantum dots-in-a-well infrared photodetectors

2009 ◽  
Vol 94 (5) ◽  
pp. 053503 ◽  
Author(s):  
L. Höglund ◽  
P. O. Holtz ◽  
H. Pettersson ◽  
C. Asplund ◽  
Q. Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Pumping ◽  
Infrared Photodetectors

scholarly journals Субмонослойные квантовые точки InGaAs/GaAs, выращенные методом МОС-гидридной эпитаксии

2019 ◽  
Vol 53 (8) ◽  
pp. 1159
Author(s):  
В.Я. Алешкин ◽  
Н.В. Байдусь ◽  
А.А. Дубинов ◽  
К.Е. Кудрявцев ◽  
С.М. Некоркин ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Room Temperature ◽  
Optical Pumping ◽  
Liquid Nitrogen Temperature ◽  
Stimulated Emission ◽  
Threshold Power ◽  
Gaas Substrates ◽  
Dot Density ◽  
Hydride Epitaxy

AbstractThe mode of the growth of InGaAs quantum dots by MOS-hydride epitaxy on GaAs substrates without a deviation and with a deviation of 2° is selected for laser structures emitting at wavelengths above 1.2 μm at room temperature. As a result, a quantum-dot density of 4 × 10^10 cm^–2 is achieved. Stimulated emission is observed in laser structures with seven layers of quantum dots at a wavelength of 1.06 μm at liquid-nitrogen temperature. The threshold power density of optical pumping is about 5 kW/cm^2.

scholarly journals Использование микродисковых лазеров с квантовыми точками InAs/InGaAs для биодетектирования

2019 ◽  
Vol 45 (23) ◽  
pp. 10
Author(s):  
М.В. Фетисова ◽  
А.А. Корнев ◽  
А.С. Букатин ◽  
Н.А. Филатов ◽  
И.Е. Елисеев ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Monoclonal Antibodies ◽  
Active Region ◽  
Room Temperature ◽  
Optical Pumping ◽  
Threshold Power ◽  
Gaas Substrates ◽  
Microdisk Lasers ◽  
Resonant Laser ◽  
Secondary Antibodies

The paper demonstrates the possibility of using microdisk lasers 10 µm in diameter with an active region based on InAs/InGaAs quantum dots synthesized on GaAs substrates for biodetection. As a detectable object we used chimeric monoclonal antibodies to the CD20 protein covalently attached to the surface of microdisk lasers operating under optical pumping at room temperature in an aqueous medium. It was shown that the attached secondary antibodies cause an increase in the threshold power of lasing and also to an increase in the half-width of the resonant laser line.

Two-color lasing in a coupled multilayer cavity with InAs quantum dots by optical pumping

2013 ◽  
Vol 10 (11) ◽  
pp. 1434-1437 ◽  
Author(s):  
Takahiro Kitada ◽  
Chiho Harayama ◽  
Ken Morita ◽  
Toshiro Isu
Keyword(s):  
Quantum Dots ◽  
Optical Pumping ◽  
Inas Quantum Dots

scholarly journals Long nuclear spin polarization decay times controlled by optical pumping in individual quantum dots

2008 ◽  
Vol 77 (12) ◽  
Author(s):  
M. N. Makhonin ◽  
A. I. Tartakovskii ◽  
A. B. Van’kov ◽  
I. Drouzas ◽  
T. Wright ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Spin Polarization ◽  
Nuclear Spin ◽  
Optical Pumping ◽  
Nuclear Spin Polarization ◽  
Decay Times

scholarly journals Optical Pumping of the Electronic and Nuclear Spin of Single Charge-Tunable Quantum Dots

2005 ◽  
Vol 94 (4) ◽  
Author(s):  
A. Bracker ◽  
E. Stinaff ◽  
D. Gammon ◽  
M. Ware ◽  
J. Tischler ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Nuclear Spin ◽  
Optical Pumping ◽  
Single Charge

Gain Control in Semiconductor Quantum Dots via State-Resolved Optical Pumping

2009 ◽  
Vol 102 (12) ◽  
Author(s):  
Ryan R. Cooney ◽  
Samuel L. Sewall ◽  
D. M. Sagar ◽  
Patanjali Kambhampati
Keyword(s):  
Quantum Dots ◽  
Optical Pumping ◽  
Gain Control ◽  
Semiconductor Quantum Dots
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