Strong exciton-photon coupling in open semiconductor microcavities

Journal article

We present a method to implement 3-dimensional polariton confinement with in-situ spectral tuning of the cavity mode. Our tunable microcavity is a hybrid system consisting of a bottom semiconductor distributed Bragg reflector (DBR) with a cavity containing quantum wells (QWs) grown on top and a dielectric concave DBR separated by a micrometer sized gap. Nanopositioners allow independent positioning of the two mirrors and the cavity mode energy can be tuned by controlling the distance between them. When close to resonance, we observe a characteristic anticrossing between the cavity modes and the QW exciton demonstrating strong coupling. For the smallest radii of curvature concave mirrors of 5.6μm and 7.5μm, real-space polariton imaging reveals submicron polariton confinement due to the hemispherical cavity geometry. © 2014 AIP Publishing LLC.

Authors: Dufferwiel, S; Fras, F; Trichet, A; Walker, P; Li, F

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: American Institute of Physics
• Journal: Applied Physics Letters
• Volume: 104
• Issue: 19
• Article number: 192107
• Publication date: 2014-01-01
• DOI: 10.1063/1.4878504
• EISSN: 1077-3118
• ISSN: 0003-6951