Three-dimensional organic microlasers were fabricated and lasing with low threshold was demonstrated. The
cavities were fabricated via UV lithography from SU-8 doped with different laser dyes. The fabrication scheme
relies on commercially available products and is both cheap and rapid. Cubic and stripe-shaped (Fabry-P´erot)
microlasers were investigated. The periodic ray trajectories on which their lasing modes are localized were
identified as a first step towards the exploration of general three-dimensional microlasers.