T-matrix many-particle theory for low-dimensional semiconductor optics

M. F. Pereira, T. Schmielau, R. Schepe, K. Henneberger

Research output: Contribution to journalConference articlepeer-review


In low-dimensional systems, quantum-confinement and bandstructure effects strongly influence the many-particle effects that ultimately give rise to the nonlinear optical properties of semiconductors. In this paper, we use a Keldysh Green's functions approach to obtain numerical results for isolated quantum wells and coupled superlattices, and investigate in different limits the combination of band-structure and many-particle effects. The inclusion of higher order Coulomb correlations gives rise to deviations from the results found in the literature for low carrier densities and temperatures, which increase with the fundamental band gap, and may be relevant for future optical device design and operation. The optical spectra presented illustrate the theoretical approach and provide insight on the physical mechanisms responsible for lasing in wide-band gap heterostructures, as contrasted to the usual III-V systems.

Original languageBritish English
Pages (from-to)105-116
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1999
EventProceedings of the 1999 Physics and Simulation of Optoelectronic Devices VII - San Jose, CA, USA
Duration: 25 Jan 199929 Jan 1999


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