Polariton condensation in a strain-compensated planar microcavity with InGaAs quantum wells

Cilibrizzi, Pasquale, Askitopoulos, Alexis, Silva, Matteo, Bastiman, Faebian, Clarke, Edmund, Zajac, Joanna M., Langbein, Wolfgang and Lagoudakis, Pavlos G. (2014) Polariton condensation in a strain-compensated planar microcavity with InGaAs quantum wells. Applied Physics Letters, 105 (19), [191118]. (doi:10.1063/1.4901814).

Abstract

The investigation of intrinsic interactions in polariton condensates is currently limited by the photonic disorder of semiconductor microcavity structures. Here, we use a strain compensated planar GaAs/AlAs0.98P0.02 microcavity with embedded InGaAs quantum wells having a reduced cross-hatch disorder to overcome this issue. Using real and reciprocal space spectroscopic imaging under non-resonant optical excitation, we observe polariton condensation and a second threshold marking the onset of photon lasing, i.e., the transition from the strong to the weak-coupling regime. Condensation in a structure with suppressed photonic disorder is a necessary step towards the implementation of periodic lattices of interacting condensates, providing a platform for on chip quantum simulations.

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Contributors

Author: Pavlos G. Lagoudakis

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