Theory of quantum-coherence phenomena in semiconductor quantum dots

The extension of quantum-coherence phenomena in semiconductor quantum dots was analyzed. The occurrence of inversionless gain, electromagnetically induced transparency (EIT) and refractive index enhancement in the transient regime for a quantum-dot structure was predicted by the calculations. The calculations also indicated important deviations from atomic systems, because of strong influences from other quantum-dot states and from the continuum consisting of states from the surrounding quantum well. The results show that quantum-dot structure should not be treated as an isolated few-level system.