@inproceedings{4e956bd8e10f4af888dc3bc9fb70ec33,
title = "Theory of luminescence and optical refrigeration in p-doped semiconductors",
abstract = "We present a microscopic many-body theory of optical refrigeration of p-doped semiconductors. Conceptually, the refrigeration mechanism is the upconversion of pump photons through absorption and subsequent luminescence by electron-hole pairs. The electron-hole pair can be an unbound pair, a pair bound by the attractive Coulomb interation (exciton), or a pair in which the hole is located at an acceptor site. Assuming the electron-hole pairs to be in quasi-thermal equilibrium, our theory calculates its absorption and luminescence spectra within a diagrammatic (real-time) Green's function approach at the self-consistent T-matrix level. The strong on-site Coulomb repulsion of holes at acceptor sites is taken into account via a truncation of the acceptor Fock space, which excludes states with higher than single-hole occupation. The resulting absorption and luminescence spectra are used in a cooling threshold analysis for GaAs that also takes into account other losses into heat. We compare the present results for p-doped GaAs with previous ones obtained for undoped GaAs.",
author = "G. Rupper and Kwong, {N. H.} and B. Gu and R. Binder",
year = "2008",
month = may,
day = "15",
doi = "10.1117/12.765276",
language = "English (US)",
isbn = "9780819470829",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Laser Refrigeration of Solids",
note = "Laser Refrigeration of Solids ; Conference date: 23-01-2008 Through 24-01-2008",
}