Cavity-induced antiguiding in a selectively oxidized vertical-cavity surface-emitting laser

Cavity-induced antiguiding of a lasing mode is demonstrated in a vertical-cavity surface-emitting laser (VCSEL). Selective oxidation of a distributed Bragg reflector (DBR) layer is used to generate a spectrally red-shifted cavity region cladding the lasing mode, with a second selectively oxidized aperture used to form the current confinement to the antiguided mode. Near-field, far-field, and spectral measurements are used to characterize lasing in both the antiguided mode and the antiguiding region.