Electrically pumped microcavity polariton lasers on nonpolar m-plane and semipolar GaN

本课程的目的是了解垂直腔体发射体和腔体极化子的基本原理，从而实现电泵浦微腔激光器和极化子激光器在非极性m平面和半极型GaN上的调谐。其智能优点在于展示了一种新型的增益介质，并通过开发一种使用氮化物材料的模型系统来推进微腔技术，该材料具有大的激子结合能、改进的光学矩阵元素和非极性和半极性取向的高空穴浓度。发展室温低阈值极化子激光器需要集成高反射率的GaN基底反射器和介质顶反射器、高质量的氮化物外延异质结和量子阱，以及支持均匀载流子注入的高效接触层和有源区异质结，同时保持强激子-光子耦合状态。更广泛的影响是材料科学和微腔器件技术的进步，以开发与垂直腔面发射激光器相比门槛显著降低的新型激光器，并为培养尖端半导体光电子学和微腔物理基础的研究生和本科生提供理想的多学科研究环境。变革性的应用包括光学逻辑元件，与传统的硅基电子产品相比，其功率水平要低得多，可用于超高速光学计算和片上通信，从而显著节省能源，从而减少碳排放。通过现有暑期研究计划招募的本科生将被纳入这项研究，教育基础设施将通过基于网络的努力和将基本发现纳入研究生课程而得到加强。

The objective of this program is to understand the fundamentals governing vertical cavity emitters and cavity polaritons leading to attunement of electrically pumped microcavity lasers and polariton lasers on nonpolar m-plane and semipolar GaN. The intellectual merit is in demonstrating a new type of gain medium and advancing microcavity technologies by developing a model system using nitride materials with large exciton binding energies, improved optical matrix elements and high hole concentrations in the nonpolar and semipolar orientations. Developing room temperature low threshold polariton lasers will require integration of high reflectivity GaN-based bottom and dielectric top reflectors, high quality nitride epitaxial heterostructures and quantum wells, and efficient contact layers and active region heterostructures supporting uniform carrier injection while preserving the strong exciton-photon coupling state. The broader impacts are the advancement of materials science and microcavity device technologies for the development of a new type of laser with significantly lower threshold compared to the vertical cavity surface emitting lasers and in providing an ideally suited multidisciplinary research environment for educating graduate and undergraduate students in the fundamentals of cutting-edge semiconductor optoelectronics and microcavity physics. The transformative applications include optical logic elements operating at much lower power levels compared to conventional Si-based electronics for ultrafast optical computing and on-chip communications with significant energy savings and therefore reduced carbon emissions. Undergraduate students, recruited through existing summer research programs, will be included in this research and educational infrastructure will be enhanced by web-based efforts and by incorporating the fundamental discoveries into the graduate curriculum.