Direct Optical Excitation of Quantum-Degenerate Exciton States in Semiconductors
M. Kira, S. W. Koch, G. Khitrova, H. M. Gibbs
Abstract
Quantum electrodynamic calculations predict that truly incoherent light can be used to efficiently generate quantum-degenerate exciton population states. Resonant incoherent excitation directly converts photons into excitons with vanishing center of mass momentum. The populated exciton state possesses long-range order, is very stable against perturbations, and should be observable via its unusual directional and density dependence in luminescence measurements.
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