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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2015

Two-dimensional Fourier transform spectroscopy of exciton-polaritons and their interactions

Résumé

We investigate polariton-polariton interactions in a semiconductor microcavity through two-dimensional Fourier transform (2DFT) spectroscopy. We observe, in addition to the lower-lower and the upper-upper polariton self-interactions, a lower-upper cross interaction. This appears as separated peaks in the on-diagonal and off-diagonal parts of 2DFT spectra. Moreover, we elucidate the role of the polariton dispersion through a fine structure in the 2DFT spectrum. Simulations, based on lower-upper polariton basis Gross-Pitaevskii equations including both self-and cross interactions, result in a 2DFT spectra in qualitative agreement with experiments.
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hal-01198561 , version 1 (22-09-2015)

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N. Takemura, Stephane Trebaol, M.D. Anderson, V. Kohnle, Yoan Léger, et al.. Two-dimensional Fourier transform spectroscopy of exciton-polaritons and their interactions. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2015, 92 (12), pp.125415. ⟨10.1103/PhysRevB.92.125415⟩. ⟨hal-01198561⟩
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