Journal
PHYSICAL REVIEW LETTERS
Volume 84, Issue 7, Pages 1547-1550Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.1547
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We experimentally demonstrate resonant coupling between photons and excitons in microcavities which can efficiently generate enormous single-pass optical gains approaching 100. This new parametric phenomenon appears as a sharp angular resonance of the incoming pump beam, at which the moving excitonic polaritons undergo very large changes in momentum. Ultrafast stimulated scattering is clearly identified from the exponential dependence on pump intensity. This device utilizes boson amplification induced by stimulated energy relaxation.
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