Semiconductor Spin-Lasers

半导体自旋激光器

• 批准号: 1102092
• 负责人: Igor Zutic
• 金额: $ 29.55万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1102092&HistoricalAwards=false
• 关键词: Semiconductor; Spin; Lasers

Objective: Development of the theoretical framework for semiconductor spin-lasers, injected with spin-polarized carriers, and evaluation of how they can outperform their conventional (spin-unpolarized) counterparts. Intellectual Merit: Practical spintronic devices have shown a remarkable success for magnetic storage and sensing, but remain of limited use for advanced signal processing and digital logic. This proposal will explore alternative realizations of spin-based applications, stimulated by the experimental breakthroughs in spin-lasers: lasing threshold reduction and strong modulation of the emitted light, even at fixed injection intensity. The proposal will study how these principles can be utilized to: enable superior dynamical performance including enhanced bandwidth, chirp reduction, ultrafast switching, and provide guidance for future experimental efforts by exploring novel device concepts and geometries. By developing theoretical and modeling techniques, from rate and drift-diffusion equations to rigorous microscopic description, it will also be possible to advance the understanding of conventional lasers. This proposal can have a transformative effect, spin-lasers would enable secure communications, high-bandwidth interconnects, and reduced power-dissipation. Broader Impacts: The majority of public school students from Buffalo have no exposure to physical sciences that subsequently deters them from considering careers in science and engineering. To address this concern, the PI will organize summer workshops (Lasers: Theory and Experiment) focusing on the participation of underrepresented groups. A textbook on spintronics will be completed, facilitated by the continued collaboration with J. Fabian (U. Regensburg), to address the lack of suitable resources in spintronics and offer a structured material that can be tailored in many different course offerings.

目的：开发半导体自旋激光剂的理论框架，注入自旋极化载体，并评估它们如何胜过其常规（自旋 - 无极化）对应物。智力优点：实用的自旋设备在磁性存储和传感方面取得了显着的成功，但在高级信号处理和数字逻辑中的使用量仍然有限。该建议将探索基于自旋的应用的替代实现，这是由自旋激光器中的实验突破所刺激的：即使在固定注射强度下，激光阈值的降低和发射光的强烈调制也是如此。该提案将研究如何利用这些原理来：启用卓越的动态性能，包括增强的带宽，减少CHIRP，超快切换，并通过探索新颖的设备概念和几何形状来为未来的实验努力提供指导。通过开发理论和建模技术，从速率和漂移扩散方程到严格的显微镜描述，也可以提高对常规激光器的理解。该提案可以具有变革性的效果，自旋激光器可以实现安全的通信，高带宽互连和降低功率散射。更广泛的影响：来自布法罗的大多数公立学校学生没有接触物理科学，随后阻止了他们考虑科学和工程学的职业。为了解决这一问题，PI将组织夏季研讨会（激光：理论和实验），重点是代表性不足的群体的参与。与J. Fabian（U. Regensburg）继续合作，将完成一本关于Spintronics的教科书，以解决Spintronics中缺乏合适的资源，并提供可以在许多不同课程产品中量身定制的结构化材料。