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

ECCS-0702467A。马萨诸塞州洛厄尔大学Akyurtlu的智慧优点：在这项建议中，在THz频率范围内引入了一种新的替代负折射率超材料设计中的传统金属--磁性半导体。该设计的成功验证将代表着一种均匀、低损耗、可调的负折射率太赫兹超材料的首批实际实现之一。这种基本均匀的介质在负折射率超材料领域从未见过报道。如果要在实际应用中使用多层结构(特别是在高频区域的尺度变得更小的情况下)，那么所提出的材料在制造方面比其复合材料对应物具有优势，这是因为对准、对准和在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中的电和磁子系统中的小损耗而与其相关的低损耗。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通过外部磁场来调节。更广泛的影响：拟议设计的成功验证将代表着同质、低损耗和可调THz超材料的首批实际实施之一。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。为了在代表不足的群体的教育早期阶段影响他们的生活，私人助理将参与青年学者计划，该计划是马萨诸塞大学洛厄尔分校和劳伦斯中学的合作伙伴关系。将举办以超材料为重点的电磁学讲习班。研讨会将由理论和实践部分组成。作为社区宣传的一部分，已经制定了一项计划，在资助期的每一年为波士顿科学博物馆制作一次为期一天的演示文稿，向非科学界介绍电磁超材料专题。

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.