Monolithic High Contrast Grating Nitride-Based VECSEL

This paper proposes a new design for a nitride-based vertical-external-cavity surface-emitting laser (VECSEL) emitting at 394 nm. The structure contains a monolithic high contrast grating (MHCG) instead of a conventional distributed Bragg reflector (DBR), makes the vertical design of the laser more compact. In a numerical analysis, we consider several designs for MHCG VECSELs and show that replacing the DBR with an MHCG improves laser performance by 50%, in terms of output energy and slope efficiency. Further optimization of the MHCG VECSEL design achieves an almost threefold improvement in both values.