Dilute nitride and other approaches to 1300-1650 nm VCSELs

随着应用范围的不断扩大，垂直腔面发射激光器(VCSEL)具有重要的商业价值，对波长范围的要求也越来越高。虽然波长较短的VCSEL正在商业化生产，但发射波长为1300 nm和更长波长的VCSEL即使在范围较短的一端也不容易获得。这是由于未能理解这些波长所需的有源区材料和相关的降解过程。该项目将专注于为新材料开发高效工艺，如用于长波长运行的稀氮化物、锑化物和双胺。我们设想了新的器件设计，从而在大面积基板上实现出色的激光性能以及均匀性和成品率。学生将利用NextNano和光子设计等模型包进行设备设计，以及一系列先进的材料和设备表征技术，以便在开发新设备概念之前了解结果。这些具有高光束质量的长波长垂直腔面发射激光器有望在通信、激光雷达和其他测量应用中占据主导地位。

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 are not readily available even at the shorter end of the range. 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, antimonides 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. These long wavelength VCSELs with high beam quality are expected to dominate Comms, LIDAR and other measurement applications.