The Impact of Oxide Layer Placement and Thickness on the Optical Properties of Oxide-Confined VCSEL

The oxide-confined vertical-cavity surface-emitting laser (VCSEL) is examined through simulation and analysis utilizing the Finite Difference Frequency Domain (FDFD) microcavity model available in the PICS3D simulation package. Using the full vectorial microcavity model enables an accurate analysis of both the dominant and higher order modes, therefore offering a comprehensive understanding of the impact of the optical cavity structural parameters. In this proceeding, the influence of oxide layer position and thickness on optical modes, lasing mode control and the threshold current are investigated. The simulated optimized oxide VCSEL demonstrates a threshold current of 0.7mA coupled with far-field divergent angle of almost 8°.