  We measured the far-field emission patterns in three dimensions of flat
organic dye microlasers using a solid angle scanner. Polymer-based
microcavities of ribbon shape (i.e., Fabry-Perot type) were investigated. Out
of plane emission from the cavities was observed, with significant differences
for the two cases of resonators either fully supported by the substrate or
sustained by a pedestal. In both cases, the emission diagrams are accounted for
by a model combining diffraction at the cavity edges and reflections from the
substrate.
