title: Angle-resonant stimulated polariton amplifier
abstract: 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.
authors.affiliation: Department of Physics & Astronomy, University of Southampton, Southampton SO17 1BJ, United Kingdom.
authors.initials: PG
authors.lastname: Savvidis
authors.initials: JJ
authors.lastname: Baumberg
authors.initials: RM
authors.lastname: Stevenson
authors.initials: MS
authors.lastname: Skolnick
authors.initials: DM
authors.lastname: Whittaker
authors.initials: JS
authors.lastname: Roberts