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Spin exchange interaction with tunable range between graphene quantum dots
Spin exchange interaction tunable graphene quantum dots
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2010/11/22
We study the spin exchange between two electrons localized in separate quantum dots in graphene.The electronic states in the conduction band are coupled indirectly by tunneling to a common continuum o...
Giant Stark effect in the emission of single semiconductor quantum dots
Giant Stark effect single semiconductor quantum dots
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2010/11/19
We study the quantum-confined Stark effect in single InAs/GaAs quantum dots embedded within a AlGaAs/GaAs/AlGaAs quantum well. By significantly increasing the barrier height we can observe emission fr...
Resonant Light Absorption by Semiconductor Quantum Dots
Light Absorption quantum wells Semiconductor Quantum Dots
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2009/9/4
The cross-section of light absorption by size-quantized semiconductor quantum dots (QD) is calculated in the case of a resonance with an exciton Γ6×Γ7 in cubical crystals of Td class. The interference...
Two-photon Absorption Processes in Semiconductor Quantum Dots
Nonlinear absorption Two-photon absorption Quantum dots
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2010/9/29
The two-photon absorption process is a nonlinear phenomenon that shows very low optical efficiency in bulk
semiconductors. For this reason the detection of these processes becomes very difficult from...
Numerical Simulation of the Optical Properties of SiC/SiO2 Quantum Dots
Numerical Simulation the Optical Properties SiC/SiO2 Quantum Dots
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2010/10/21
We perform a theoretical investigation of the absorption and emission properties of quantum confined SiC/SiO2 spherical quantum dots, focusing on the the size-dependent emission and absorption spectra...