Dilute nitride and other approaches to 1300nm VCSELs

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Vertical Cavity Surface Emitting Lasers (VCSELs) are commercially important with an increasing range of applications and are required over an increasing range of wavelengths. While shorter wavelengths are in commercial manufacture VCSELs emitting at 1300nm and longer wavelengths have been claimed but are not available on a commercial basis. This stems from a failure to understand the active region materials necessary for these wavelengths and associated degradation processes. The project will focus on developing efficient processes for new materials such as dilute nitrides and bismides for long wavelength operation. We envisage new device designs resulting in excellent laser performance and also uniformity and yield over large area substrates. Students will utilise modelling packages such as nextnano and photon design for device design and a series of advanced characterisation techniques for materials and devices for understanding results before developing new device concepts.