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

eccs - 0702467 a吗。智力优势：在本提案中，在负折射率超材料设计中引入了一种新的替代品——磁性半导体——用于太赫兹频率区。该设计的成功验证将代表具有负折射率的均匀、低损耗和可调谐太赫兹超材料的首次实际实现之一。这种主要均匀介质在负折射率超材料领域从未报道过。如果要在实际应用中使用这些材料（特别是当高频区域的尺度变小时），那么所提出的材料在制造方面比其复合材料具有优势，在对齐、配准和创建多层结构方面存在困难。所提出的材料的另一个重要特征是由于磁性半导体内的电和磁子系统的小损耗，与之相关的低损耗。超材料的性质可以通过制造参数来调节，也可以通过改变太赫兹区域内带的位置来调节外部磁场。更广泛的影响：所提议的设计的成功验证将代表一种均匀的、低损耗的、可调谐的太赫兹超材料的第一个实际实现。这些超材料可能在人员安全筛查、医学成像、遥感、生物医学和用于高通量筛查的传感器等领域产生重大影响。为了在教育的早期阶段影响弱势群体的生活，pi将参与青年学者计划，这是马萨诸塞大学洛厄尔分校和劳伦斯中学之间的合作伙伴关系。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，已经制定了一项计划，在每年的资助期内，为波士顿科学博物馆开发一天的演讲，向非科学界描述电磁超材料的主题。

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.