Theory of Electrons in Solids

固体电子理论

• 批准号: 9117298
• 负责人: Lu Sham
• 金额: $ 34.5万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-02-01 至 1995-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9117298&HistoricalAwards=false
• 关键词: Theory; Electrons; Solids

Theory of Electrons in Solids - Electronic properties of semiconductor heterostructures, including energy and spin relaxation, will be studied as functions of confinement of the electrons by the structural formation and as functions of electron interaction among themselves and with other excitations. Specific systems for the proposed study are lateral superlattices on vicinal plane quantum wells for both III-V and silicon/germanium composites and p-type quantum wells. The theory of optical properties in these systems will be investigated and used to predict and to understand observed optical phenomena. In particular, the time evolution of the optical spectra with specific polarizations will be studied on a picosecond scale. Study of the electronic interaction will also be extended to solids with narrow electronic bands. %%% Semiconductor heterostuctures are layered composite structures having at least one very small dimension. Such structures are being investigated intensively for application, particularly as optoelectronic devices. This project will examine issues central to such applications, including the effect of the minute size on energy and spin relaxation. The optical properties, both static and dynamic, of this class of artificially structured materials will be examined. These studies are aimed at understanding the intrinsic effect of the heterostructure design on the desired characteristics, including optical frequency range, bandwidth, and sensitivity of the ultamate device.

固体电子理论 - 半导体异质结构的电子特性，包括能量和自旋弛豫，将被研究为结构形成对电子的限制的函数以及电子之间以及与其他激发的相互作用的函数。 该研究的具体系统是 III-V 族和硅/锗复合材料以及 p 型量子阱的邻平面量子阱上的横向超晶格。 这些系统中的光学特性理论将被研究并用于预测和理解观察到的光学现象。 特别是，将在皮秒尺度上研究具有特定偏振的光谱的时间演化。 电子相互作用的研究也将扩展到具有窄电子带的固体。 %%% 半导体异质结构是具有至少一个非常小的尺寸的层状复合结构。 人们正在对此类结构的应用进行深入研究，特别是作为光电器件。 该项目将研究此类应用的核心问题，包括微小尺寸对能量和自旋弛豫的影响。 将检查此类人工结构材料的静态和动态光学特性。 这些研究旨在了解异质结构设计对所需特性的内在影响，包括光学频率范围、带宽和最终器件的灵敏度。