Oxide-based photonic crystal ohmic contacts for efficient GaN-based PCSEL diodes - Photohmic

Project summary

Rationale / Needs to be addressed_x000D_ GaN Photonic Crystal (PC) Surface Emitting Lasers (PCSEL) are new, high power and single mode diode (LD) architectures which might revolutionize the power LD market. However, their potential is hindered by the requirement of very challenging sub-micrometer etching of the PC into GaN, generating defects lowering the efficiency of the LD._x000D_ Objectives _x000D_ The objective of the project is to facilitate the technology of fabricating GaN PCSELs by developing ZnO:Al-based top ohmic contacts hosting the photonic crystals and acting as a current spreading layer, removing the need for degradation-inducing etching of the PCs into GaN. _x000D_ Potential applications_x000D_ The new LDs can find applications in laser displays, automotive beams, or machining. _x000D_ Impact and potential benefits_x000D_ The idea is a paradigm shift from the current developments in this hot topic. It will facilitate processing and improve the quality of the crystal structures, translating to better LDs at lower cost.