Coherent and incoherent aspects of polariton dynamics in semiconductor microcavities

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.


Published in:
Physical Review B, 94, 19, 195301
Year:
2016
Publisher:
College Pk, Amer Physical Soc
ISSN:
2469-9950
Laboratories:




 Record created 2017-01-24, last modified 2018-09-13

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