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Abstract: Based on a microscopic many-particle theory we study the amplification ofpolaritons in a multiple-quantum-well resonant photonic crystal. For theBragg-spaced multiple quantum wells under investigation we predict that in atypical pump-probe setup four-wave mixing processes can lead to an unstableenergy transfer from the pump into the probe and the background-free four-wavemixing directions. We find that under certain excitation conditions thisphase-conjugate oscillation induced instability can lead to a largeamplification of the weak probe pulse.



Author: S. Schumacher, N. H. Kwong, R. Binder

Source: https://arxiv.org/







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