Novel Homogenous, Low-loss, and Tunable Magnetic Semiconductor-based Metamaterials

新型均质、低损耗、可调谐磁性半导体超材料

• 批准号: 0702467
• 负责人: Alkim Akyurtlu
• 金额: --
• 依托单位: University of Massachusetts Lowell
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-04-01 至 2011-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0702467&HistoricalAwards=false
• 关键词: Novel; Homogenous; Low; loss; Tunable

ECCS-0702467A. Akyurtlu, University of Massachusetts LowellIntellectual Merit: In this proposal, a new substitute for traditional metals in negative index of refraction metamaterial design - the Magnetic Semiconductor- is introduced for the THz frequency regime. The successful validation of the proposed design would represent one of the first practical implementation of a homogenous, low-loss, and tunable THz metamaterial with negative refractive index. This principally homogeneous medium has never been reported in the field of negative index of refraction metamaterials. The proposed material has an advantage in fabrication over its composite counterparts, with respect to the difficulty in alignment, registration, and in creating multi-layer structures if one is to use these in actual applications (especially as scales become smaller for high frequency regimes). Another important feature of the proposed material is the low losses associated with it due to the small losses in both the electric and the magnetic sub-systems within the magnetic semiconductor. The properties of the metamaterials can be tuned via fabrication parameters and also by an external magnetic field by shifting the position of the band inside the THz region. Broader Impact: The successful validation of the proposed design would represent one of the first practical implementation of a homogenous, low-loss, and tunable THz metamaterial. These metamaterials could potentially make a significant impact in the areas of personnel security screening, medical imaging, remote sensing, biomedicine, and sensors for high throughput screening. In order to impact the lives of underrepresented groups at an early stage of their education, the PIs will be involved with the Young Scholars Program, which is a partnership between the University of Massachusetts Lowell and Lawrence Middle Schools. A workshop on electromagnetics with emphasis on metamaterials will be developed. The workshop will consist of theoretical and hands-on components. As part of community outreach, a plan to develop a one day presentation, in each year of the funding period, for the Museum of Science in Boston which will describe the topic of electromagnetic metamaterials, to the non-scientific community has been devised.

ECCS-0702467A。Akyurtlu，马萨诸塞州洛厄尔大学知识分子优点：在这个建议中，一个新的替代传统的金属在负折射率超材料设计-磁性半导体-被引入太赫兹频率制度。所提出的设计的成功验证将代表具有负折射率的均匀，低损耗和可调谐THz超材料的第一个实际实现之一。这种基本上均匀的介质在负折射率超材料领域从未有过报道。所提出的材料在制造方面优于其复合对应物，相对于对准、配准和创建多层结构的难度，如果要在实际应用中使用这些（特别是当尺度对于高频区域变得更小时）。所提出的材料的另一个重要特征是由于小损耗而与之相关的低损耗 在磁性半导体内的电和磁子系统中。超材料的特性可以通过制造参数进行调整，也可以通过外部磁场来调整太赫兹区域内的能带位置。更广泛的影响：所提出的设计的成功验证将代表均匀，低损耗和可调谐THz超材料的第一个实际实现之一。这些超材料可能在人员安全筛查、医学成像、遥感、生物医学和高通量筛查传感器等领域产生重大影响。为了在教育的早期阶段影响代表性不足的群体的生活，PI将参与青年学者计划，这是马萨诸塞州洛厄尔大学和劳伦斯中学之间的伙伴关系。将举办一个以超材料为重点的电磁学讲习班。研讨会将包括理论和实践部分。作为社区外展的一部分，计划在资助期间的每一年为波士顿科学博物馆制定一天的演讲，向非科学界介绍电磁超材料的主题。