Engineering the spatial confinement of exciton-polaritons in semiconductors
Reda Idrissi Kaitouni, Ounsi El Daif, Maxime Richard, Pierre Lugan, Augustin Baas, Thierry Guillet, François Morier-Genoud, Jean-Daniel Ganière, Jean-Louis Staehli, Vincenzo Savona, Benoît Deveaud
Abstract
We demonstrate the spatial confinement of electronic excitations in a solid state system, within novel artificial structures that can be designed having arbitrary dimensionality and shape. The excitations under study are exciton-polaritons in a planar semiconductor microcavity. They are confined within a micron-sized region through lateral trapping of their photon component. Striking signatures of confined states of lower and upper polaritons are found in angle-resolved light emission spectra, where a discrete energy spectrum and broad angular patterns are present. A theoretical model supports unambiguously our observations.
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