Quantum Transport in Semiconductor and Metal Microstructures

半导体和金属微结构中的量子传输

• 批准号: 9112752
• 负责人: Daniel Prober
• 金额: $ 36.5万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-15 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9112752&HistoricalAwards=false
• 关键词: Quantum; Transport; Semiconductor; Metal; Microstructures

This research is concerned with mesoscopic phenomena in gallium arsenide and metal microstructures, primarily related to conductance fluctuations, tunneling, and phase coherence. One- dimensional wires will be fabricated using electron-beam lithograpy techniques followed by ion-beam irradiation that produces a relatively sharp boundary between insulating and metallic regions. These one-dimensional wires will be used to study quantum chaotic scattering, a new and active field of physics. One-dimensional wires of beta-tantalum will also be made to provide a cleaner system for the study of universal conductance fluctuations. In a third area a Wheatstone Bridge will be constructed of four gallium arsenide arms that will be utilized to detect single photons. A DX center in the gallium arsenide will absorb a single photon leading to a conductance fluctuation "step". This is a novel optical processing approach that leads to a discrete known change in the configuration of scattering centers.

本研究关注镓中的介观现象 砷化物和金属微结构，主要与 电导波动、隧穿和相位相干性。 一个-- 三维导线将使用电子束光刻制造 技术，然后是离子束照射，产生一个 绝缘和金属区域之间的相对尖锐的边界。 这些一维导线将被用来研究量子混沌 散射是物理学中一个新兴而活跃的领域。 一维 还将制作β-钽丝， 系统的研究普遍电导波动。 中 第三个区域，惠斯通电桥将由四个镓 砷化物臂将用于探测单光子。 的DX 砷化镓的中心会吸收一个光子 导致电导波动“阶跃”。 这是一部小说 导致离散已知变化的光学处理方法 在散射中心的配置中。