Oriented polaritons in strongly-coupled asymmetric double quantum well microcavities

Details Oriented polaritons in strongly-coupled asymmetric double quantum well microcavities Oriented polaritons in strongly-coupled asymmetric double quantum well microcavities

2011-02-14

arxiv.org/abs/1102.2852v1

Applied Physics Letters (2011)

Physics

Condensed Matter

Other Condensed Matter

3 figures

Scientific paper

Replacing independent single quantum wells inside a strongly-coupled semiconductor microcavity with double quantum wells produces a special type of polariton. Using asymmetric double quantum wells in devices processed into mesas allows the alignment of the electron levels to be voltage-tuned. At the resonant electronic tunnelling condition, we demonstrate that `oriented polaritons' are formed, which possess greatly enhanced dipole moments. Since the polariton-polariton scattering rate depends on this dipole moment, such devices could reach polariton lasing, condensation and optical nonlinearities at much lower threshold powers.

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