Dilute nitride and other approaches to 1300-1650 nm VCSELs

垂直腔面发射激光器（VCSELs）在商业上具有重要意义，应用范围越来越广，波长范围也越来越大。虽然波长较短的vcsel在商业生产中可以发射到1300纳米和波长较长的vcsel，但即使在波长较短的一端，也不容易获得。这源于未能理解这些波长和相关降解过程所需的活性区域材料。该项目将重点开发用于长波操作的稀氮化物、锑化物和双化物等新材料的高效工艺。我们设想新的器件设计产生优异的激光性能，并且在大面积基板上均匀性和良率。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开发新的设备概念之前。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.