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A microscopic theory for the terahertz response of excited semiconductor systems is presented. It is verified that the theory yields the correct effective‐mass Drude limit. For a fully interacting incoherent system, the terahertz response is shown to be determined by the electron–hole correlations. The theory is evaluated for the example of excitonic populations in a quantum‐well structure.
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Kira et al. (2003) studied this question.
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