Dilute nitride and other approaches to 1300-1650 nm VCSELs

垂直腔面发射激光器（VCSEL）随着应用范围的增加而在商业上是重要的，并且需要在增加的波长范围内。虽然较短的波长在商业制造中是在1300nm处发射的VCSEL，并且较长的波长即使在该范围的较短端也不容易获得。这是由于未能理解这些波长所需的有源区材料和相关的退化过程。该项目将专注于开发新材料的有效工艺，如用于长波长操作的稀氮化物，锑化物和铋化物。我们设想新的器件设计，从而在大面积基板上产生优异的激光性能以及均匀性和产量。学生将利用建模软件包，如nextnano和光子设计的设备设计和一系列先进的表征技术的材料和设备的理解结果，然后再开发新的设备概念。这些具有高光束质量的长波长VCSEL有望主导通信、激光雷达和其他测量应用。

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.