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Giant Stark effect in the emission of single semiconductor quantum dots
Giant Stark effect single semiconductor quantum dots
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...
Coherence and Optical Emission from Bilayer Exciton Condensates
Coherence Optical Emission Bilayer Exciton Condensates
2010/11/23
Experiments aimed at demonstrating Bose-Einstein condensation of excitons in two types of experiments with bilayer structures (coupled quantum wells) are reviewed,with an emphasis on the basic e ects....
Bosonic enhancement of spontaneous emission near an interface
Bosonic enhancement spontaneous emission
2010/11/24
We show how the spontaneous emission rate of an excited two-level atom placed in a trapped Bose-Einstein condensate of ground-state atoms is enhanced by bosonic stimulation. This stimulation depends o...
Structure, Deformations and Gravitational Wave Emission of Magnetars
Structure Deformations Gravitational Wave Emission of Magnetars
2010/12/21
Neutron stars can have, in some phases of their life, extremely strong magnetic fields, up to 1015−16 G. These objects, named magnetars, could be powerful sources of gravitational waves, since t...
Room Temperature Coherent and Voltage Tunable Terahertz Emission from Nanometer-Sized Field Effect Transistors
Room Temperature Coherent Voltage Tunable Terahertz Emission
2010/11/24
We report on reflective electro-optic sampling measurements of TeraHertz emission from nanometer-gate-length InGaAs-based high electron mobility transistors. The room temperature coherent gate-voltage...
Filamentation of Light Emission in an Infrared-Visible Image Converter with a Semiconductor Photodetector
Light Emission Infrared-Visible Image Semiconductor Photodetector
2010/4/13
This work studies the light emission patterns associated with the spatial modulation of the transversal distribution of the current density in a converter cell with a GaAs semiconductor cathode. Such ...