Dephasing of strongly coupled exciton-photon systems
The coherent dynamics of cavity-polaritons are investigated using the four-wave-mixing technique. A series of experiments on four samples operating in both the weak and strong coupling regimes were performed to study the influence of strong coupling on the interaction of cavity-polaritons with other cavity-polaritons, free carriers and acoustic phonons. Due to Rabi splitting a larger number of free carriers are created in the strong coupling sample compared with the weak coupling sample. This has a significant impact on the total scattering efficiency. The temperature dependence of the four-wave mixing yields evidence of suppression of acoustic phonon scattering compared to bare quantum well behaviour and is a result of the modified two dimensional dispersion.
Keywords: excitons- ; multiwave-mixing ; phonons- ; polaritons- ; semiconductors- ; dephasing- ; strongly-coupled-exciton-photon-systems ; coherent-dynamics ; cavity-polaritons ; four-wave-mixing-technique ; free-carriers ; acoustic-phonons ; Rabi-splitting ; total-scattering-efficiency ; temperature-dependence ; quantum-well-behaviour ; modified-two-dimensional-dispersion
Record created on 2007-08-31, modified on 2016-08-08