Terahertz, High Electric Field Quantum Transport in Verticaland Lateral Superlattices

太赫兹，垂直和横向超晶格中的高电场量子输运

• 批准号: 9300883
• 负责人: S. James Allen
• 金额: --
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-01 至 1996-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9300883&HistoricalAwards=false
• 关键词: Terahertz; Electric; Field; Quantum; Transport

Electrical transport in semiconductor superlattices and nanostructures is expected to exhibit strong non-linearities in large, high frequency electric fields. Such fields and frequencies are available from the Free Electron Laser Facility at UC Santa Barbara. This research focuses on dynamic localization, quenching of the conductance in the presence of strong, high frequency, electric fields, and photon assisted tunneling in semiconductor superlattices and multi-quantum wells. Both vertical and lateral superlattices and nanostructures will be investigated. %%% Modern materials synthesis and processing has enabled researchers to fabricate semiconductor structures that are so small that the "wave nature" of the electron controls their electrical properties. These semiconductor nanostructures are characterized by a very non- linear dependence of electron current on applied voltage, reminiscent of how a transformer works in many everday applications. However, this research addresses electrical responses many millions of times faster than in ordinary transformers, and hence may lead to the development of new devices which function at frequencies beyond even the radar frequencies common in the aircraft industry.

在半导体超级晶格和纳米结构中的电运输有望在大型高频电场中表现出强大的非线性。从加州大学圣塔芭芭拉分校的免费电子激光设施可获得此类磁场和频率。这项研究的重点是在半导体超晶格和多量器井中的强，高频，电场和光子辅助隧道的情况下在存在强，高频，电场和光子辅助隧道的情况下淬灭电导的动态定位。将研究垂直和侧面超晶格和纳米结构。 %% %%现代材料合成和加工使研究人员能够制造出很小的半导体结构，以至于电子的“波性质”控制了其电气性能。这些半导体纳米结构的特征是电子电流对施加电压的极度依赖性，使人想起变压器在许多日常应用中的工作方式。但是，这项研究解决了比普通变形金刚快数百万次的电气响应，因此可能导致新设备的开发，这些设备在飞机行业常见的雷达频率以外的频率上起作用。