Polariton condensation in a planar microcavity with InGaAs quantum wells
  Polariton lattice condensates provide a platform for on chip quantum emulations. Interactions in extended polariton lattices are currently limited by the intrinsic photonic disorder of microcavities. Here, we fabricate a strain compensated planar GaAs/AlAs microcavity with embedded InGaAs quantum wells and report on polariton condensation under non-resonant optical excitation. Evidence of polariton condensation is supported spectroscopically both in reflection and transmission geometry, whilst the observation of a second threshold to photon lasing allows us to conclusively distinguish between the strong- and weak-coupling non-linear regimes. 
Pasquale Cilibrizzi, Alexis Askitopoulos, Matteo Silva, Edmund Clarke,   Joanna M. Zajac, Wolfgang Langbein, Pavlos G. Lagou...
cond-mat.mes-hall cond-mat.mtrl-sci physics.optics