Schneider, Richard P., authorChoquette, Kent D., authorLear, Kevin L., authorKilcoyne, Sean Patrick, authorAmerican Institute of Physics, publisher2007-01-032007-01-031995Lear, K. L., et al., Modal Analysis of a Small Surface Emitting Laser with a Selectively Oxidized Waveguide, Applied Physics Letters 66, no. 20 (15 May 1995): 2616-2618.http://hdl.handle.net/10217/812We describe studies of an index-guided ~4×3 µm2 vertical cavity surface emitting laser with a cw, room temperature 133 µA threshold current and 53% slope efficiency fabricated using selective wet thermal oxidation to provide optical and electrical confinement. While the device operates strictly single mode, a large number of transverse modes are evident in the subthreshold luminescence observed in both vertical and lateral directions. Despite the lumped nature of the index region, the transverse mode wavelengths agree very well with those predicted for a conventional distributed waveguide structure. Waveguide dimensions and an effective index step of 2% between the active and cladding region are determined by fitting the modal data.born digitalarticleseng©1995 American Institute of Physics.Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.semiconductor lasersgallium arsenidesaluminium arsenidesheterojunctionslaser cavitiesindium arsenidesoxidationconfinementefficiencythreshold currentdesignfabricationoperationText