Excitation-induced energy shifts in the optical gain spectra of InN quantum dots

Lorke, M.; Seebeck, J.; Gartner, P.; Jahnke, F.; Schulz, S.
August 2009
Applied Physics Letters;8/24/2009, Vol. 95 Issue 8, p081108
Academic Journal
A microscopic theory for the optical absorption and gain spectra of InN quantum-dot systems is used to study the combined influence of material properties and interaction-induced effects. Atomistic tight-binding calculations for the single-particle properties of the self-assembled quantum-dot and wetting-layer system are used in conjunction with a many-body description of Coulomb interaction and carrier phonon interaction. We analyze the carrier-density and temperature dependence of strong excitation-induced energy shifts of the dipole-allowed quantum-dot transitions.


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