Electrically injected cavity polaritons.
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.
Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Diderot-Paris 7, 75013 Paris, France.
L
L
Sapienza
A
A
Vasanelli
R
R
Colombelli
C
C
Ciuti
Y
Y
Chassagneux
C
C
Manquest
U
U
Gennser
C
C
Sirtori