Modelling of photoelastic properties of quaternary (InGa)(AsP) semiconductor materials and its impact on PIC performance using atomistic first-principle techniques

该提案解决了与控制用于数据中心和长途电信网络的半导体材料的光学特性相关的挑战。波导材料、包层和衬底之间的晶格参数 ** 的差异在 ** 膜中引入各向异性外延应力，这导致信号的色散（即，信号的不同分量以不同的速度传播）。这种不希望的色散阻碍了诸如用于电信应用的开关之类的干涉测量设备的性能，从而提出了具有挑战性的技术问题。在产品开发过程中，** 如果可以准确预测应力，则可以对其进行控制或补偿，甚至可以将其用于新的设备功能。另一方面，不受控制的应力可能对 ** 器件性能产生不利影响，并降低生产良率。该项目的目标是为ArtIC Photonics提供四元化合物的 ** 光弹性材料特性，用于光波导中应变 ** 效应的定量建模。后者将使用原子第一原理材料模拟 ** 建模来实现。通过我们的建模工作获得的材料特性将被集成到器件 ** 模拟中，以检查应变对器件性能的影响，并与工业合作伙伴（ArtIC Photonics）进行的实验 ** 测量进行比较。

This proposal addresses a challenge related to control of optical properties of semiconducting materials for**devices used for data centers and long-haul telecommunication networks. Differences in the lattice parameter**between the waveguide material, the cladding layer and the substrate introduce an anisotropic epitaxial stress in**the film, which causes a dispersion of the signal (i.e., different components of a signal travel at different**velocities). This unwanted dispersion hinders the performance of interferometric devices such as switches for**telecommunication applications thereby posing a challenging technical problem. During product development,**if the stress can be accurately predicted then it can be either controlled, or compensated, or could even be made**use of for new device functions. On the other side, the uncontrolled stress could have detrimental effect on the**device performance and lower the production yield. The goal of this project is to provide ArtIC Photonics with**photoelastic material properties of the quaternary compound needed for quantitative modelling of the strain**effects in optical waveguides. The later will be achieved using atomistic first-principle material simulation**modelling. Material properties obtained as a result of our modelling efforts will be integrated into the device**simulation to examine the effects of the strain on device performance and compared with the experimental**measurements performed by the industrial partner (ArtIC Photonics).