Modeling and Design Optimization of High Frequency Micro and Nano Structures Exploiting Adjoint Sensitivity Analysis

利用伴随灵敏度分析的高频微纳米结构建模和设计优化

• 批准号: RGPIN-2016-05451
• 负责人: Bakr, Mohamed
• 金额: $ 2.62万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=637169
• 关键词: Modeling; Design; Optimization; Frequency; Micro

A number of high frequency technologies emerged over the past few years that offer interesting functionalities. Metamaterials, for example, introduced materials with properties that do not exist in nature. They are used in building miniaturized antennas, sensors, and filters that operate in different frequency ranges. Plasmonic devices utilize metal-dielectric interfaces to guide light below the diffraction limit. This allows the implementation of photonic devices with much smaller dimensions thus promising more integration of photonic processing units. Nano antennas (nantennas) were presented for high frequency energy harvesting and line-of-sight communication. Terahertz (THz) applications also emerged thanks to the recent availability of THz sources and detectors. All these technologies utilize materials whose properties may be dependent on source values (nonlinear), dependent on frequency (dispersive), or dependent on the direction of excitation (anisotropic). Different combinations of these properties may exist in such high frequency structures. These complex properties make the accurate modeling of these devices time- and memory-intensive. Optimization of these structures often requires estimating sensitivities of the target response with respect to all parameters. The classical approach for estimating these sensitivities requires repeated simulations of these time-intensive structures which may be prohibitive.

在过去的几年中出现了许多高频技术，提供了有趣的功能。例如，超材料引入了具有自然界中不存在的特性的材料。它们被用于建造在不同频率范围内工作的小型化天线、传感器和滤波器。等离子体器件利用金属-介电界面来引导衍射极限以下的光。这使得光子器件的尺寸更小，从而有望实现光子处理单元的更多集成。提出了用于高频能量采集和视距通信的纳米天线。由于最近太赫兹源和探测器的可用性，太赫兹（THz）应用也出现了。所有这些技术利用的材料，其性质可能取决于源值（非线性），取决于频率（色散），或取决于激发方向（各向异性）。这些特性的不同组合可能存在于这种高频结构中。这些复杂的属性使得对这些设备进行精确建模需要大量的时间和内存。这些结构的优化通常需要估计目标响应相对于所有参数的灵敏度。估计这些灵敏度的经典方法需要对这些时间密集型结构进行反复模拟，这可能是令人望而却步的。