Terahertz Excitation of Three-Level Λ-Type Exciton-Polariton Modes in Quantum-Well Microcavity

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Abstract
Interactions of strong few-cycle THz pulses with the induced optical polarization in a QW microcavity reveal that the exciton-polariton modes and the 2p-exciton state form a unique Λ-type three-level system of the coupled light-matter modes.