Magneto-optical Study of Zinc-Selenide/Zinc-Iron-Selenide Quantum Wells; A System with Magnetically Tuned Confinement

硒化锌/硒化锌铁量子阱的磁光研究；

• 批准号: 8922177
• 负责人: Athos Petrou
• 金额: $ 11.5万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-05-01 至 1993-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8922177&HistoricalAwards=false
• 关键词: Magneto; optical; Study; Zinc; Selenide

This research is concerned with studies of zinc-selenide/zinc- iron-selenide quantum well structres and zinc-iron-selenide epilayers of high quality which have been grown by molecular beam epotaxy (MBE) technique. These structures have the unusual property that the hole confinement is determined by an externally applied magnetic field. This situation leads to a novel situation concerning the different types of excitons which has never been observed in a dilute magnetic semiconductor. The zinc-selenide/zinc-iron-selenide system offers a unique opportunity to tune the quantum well potential and control the carrier confinement using an external magnetic field. Magneto- reflectance and magneto-luminescence spectroscopy measurements will be made exploring the parameter space of this system (layer thickness, iron concentration, number of wells) as well as the dependence on temperature and magnetic field. These magneto- optical studies will also be extended to doped systems.

本研究主要研究了用分子束外延(MBE)技术生长的锌-硒/锌-铁-硒量子阱结构和高质量的锌-铁-硒外延层。这些结构具有不同寻常的特性，即空穴限制由外部施加的磁场决定。这种情况导致了一种新的情况，涉及不同类型的激子，这是在稀磁半导体中从未观察到的。锌-硒/锌-铁-硒体系提供了一个独特的机会来调节量子井势，并利用外加磁场控制载流子的限制。进行了磁反射和磁致发光光谱测量，探索了该系统的参数空间(膜厚、铁浓度、势垒数)以及与温度和磁场的关系。这些磁光研究也将扩展到掺杂系统。