Nanometer Tunneling and Coherent Wave Quantum Devices

这项工作代表了纳米弹道和 量子波器件生长，制造和测试使用的 格鲁吉亚科技微电子公司提供给我们的设备 研究中心 隧道结构中的能量损失和其它散射机制 我们的小组最近发现了关键的非弹性和非k守恒 包括谷电流的隧穿事件。 我们正在进行 通过仔细研究这些谷电流分量， 准备库仑和非弹性散射中心，以确定 限制两个和三个终端性能的机制 隧道和相干波装置。 量子威尔斯中的电荷我们将测量电荷和电势 分布在稳定的和可调的量子阱器件中， 评估它们作为超快速开关、振荡器和 微波放大器 一个密切相关的项目将分别 模型和测量的动态不稳定行为在同一个 装置. 电子波光学器件示范项目 运输和磁运输实验，以证明和 完善了一种预测的电子能量选择带通滤波器 波动光学原理 这些新器件的想法模仿光学和 微波器件结构，但在长度尺度上千倍 更小。

This work represents a coordinated study of nanometer ballistic and quantum wave devices grown, fabricated, and tested using the facilities available to us at the Georgia Tech Microelectronics Research Center. Energy Loss and Other Scattering Mechanisms in Tunneling Structures Our group has recently identified key inelastic and non-k-conserving tunneling events that comprise the valley current. We are proceeding with the study of those valley current components with carefully prepared Coulomb and inelastic scattering centers, to identify mechanisms that limit the performance of two and three terminal tunneling and coherent-wave devices. Charging in Quantum Wells We will measure the charge and potential distribution in stable and bistable quantum well devices in order to evaluate their potential as ultra-fast switches, oscillators, and microwave amplifiers. A closely-associated project will separately model and measure the dynamics of astable behavior in the same devices. Electron Wave Optics Device Demonstration Project We will carry out transport and magnetotransport experiments in order to demonstrate and perfect a predicted energy-selective bandpass filter based on electron wave optic principles. These new device ideas emulate optical and microwave device structure but at length scales a thousand times smaller.