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arXiv · 1611.04770

Coherent and incoherent aspects of polariton dynamics in semiconductor microcavities

N. Takemura·M. D. Anderson·S. Biswas·M. Navadeh-Toupchi·D. Y. Oberli·M. T. Portella-Oberli·B. Deveaud
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Abstract

The interaction between coherent polaritons and incoherent excitons plays an important role in polariton physics. Using resonant pump-probe spectroscopy with selective excitation of single polariton branches, we investigate the different dephasing mechanisms responsible for generating a long-lived exciton reservoir. As expected, pumping the upper polariton results in a strong dephasing process that leads to the generation of a long lived reservoir. Unexpectedly, we observe an efficient reservoir creation while exciting only the lower polariton branch when the detuning is increased towards positive detuning. We propose a simple theoretical model, the polaritonic Bloch equations, to describe the dynamics of the system.

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N. Takemura, M. D. Anderson, S. Biswas, M. Navadeh-Toupchi, D. Y. Oberli, M. T. Portella-Oberli, B. Deveaud. 2016-11-15. Coherent and incoherent aspects of polariton dynamics in semiconductor microcavities. https://doi.org/10.1103/physrevb.94.195301

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