APS » PROLA » Phys. Rev. Lett. » Volume 84 » Issue 7

Phys. Rev. Lett. 84, 1547 - 1550 (2000)

Angle-Resonant Stimulated Polariton Amplifier

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P. G. Savvidis1, J. J. Baumberg1, R. M. Stevenson2, M. S. Skolnick2, D. M. Whittaker3, and J. S. Roberts4
1Department of Physics & Astronomy, University of Southampton, Southampton SO17 1BJ, United Kingdom
2Department of Physics, University of Sheffield, Sheffield S3 7RH, United Kingdom
3Toshiba Research Europe Ltd., Cambridge CB4 4WE, United Kingdom
4Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield S1 3JD, United Kingdom

Featured in Phys. Rev. Focus Received 30 July 1999

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.


©2000 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v84/p1547
DOI: 10.1103/PhysRevLett.84.1547
PACS: 71.36.+c, 42.50.-p, 42.65.-k, 78.47.+p

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