Excited states of InAs/GaAs quantum dots

Exciton properties of self-organized InAs/GaAs QDs are investigated. Size-s elective spectroscopy reveals the excited single-exciton transition spectru m and enhanced polar exciton-LO-phonon coupling. A good qualitative underst anding of the experimental results is achieved by eight-band kp calculation s. Renormalization of the single-exciton spectrum in highly populated QDs s hows the importance of many-particle interactions in the strong confinement limit. The ground state transition energy decreases by similar to 16 meV f or QDs occupied with similar to 18 excitons.