Spatial profiling of optical gain for optimizing lasing in plasmonic nano-lasers

摘要

Design of cylindrical metal-clad semiconductor nano-lasers is undertaken. Specific attention is given to determining the modal gain instructures supporting TM01 Surface Plasmon Polarition (SPP) modes. For representative structures it is indicated that cavity lengths oforder 100 μm enable lasing action. In comparison structures supporting TE01 core-confined modes having cavity lengths of order 10 μm may sustain lasing. The analysis methodology adopted offers means to affect the design of candidate semiconductor lasers for bespokeapplications.