Electrically injected cavity polaritons |
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Authors: | Sapienza L Vasanelli A Colombelli R Ciuti C Chassagneux Y Manquest C Gennser U Sirtori C |
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Institution: | Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Diderot-Paris 7, 75013 Paris, France. |
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Abstract: | We have realized an electroluminescent device operating in the light-matter strong-coupling regime based on a GaAs/AlGaAs quantum cascade structure embedded in a planar microcavity. At zero bias, reflectivity measurements show a polariton anticrossing between the intersubband transition and the cavity mode. Under electrical injection the spectral features of the emitted light change drastically, as electrons are resonantly injected in a reduced part of the polariton branches. Our experiments demonstrate that electrons can be selectively injected into polariton states up to room temperature. |
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