Phys. Rev. Lett. 91, 156403 (2003) [4 pages]Dynamical Theory of Polariton AmplifiersReceived 14 May 2003; published 10 October 2003 We present the theory of the dynamics of the polariton amplifier in the region of small polariton densities. We give an analytical solution for the polariton condensate density matrix and show that the formation of a coherent quantum state is possible. Once the condensate is formed, the coherence becomes macroscopically long living. Polariton amplifier represents, therefore, an optical memory element, where the input weak coherent signal can be amplified and kept. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.156403
DOI:
10.1103/PhysRevLett.91.156403
PACS:
71.36.+c, 42.50.–p, 42.55.Sa, 78.47.+p
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