Design, Self-Assembly and Characterization of Three-Dimensional Metamaterials in the Infrared Region

红外区三维超材料的设计、自组装和表征

基本信息

批准号：
1507749
负责人：
David Gracias
金额：
$ 50万
依托单位：
Johns Hopkins University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2015
资助国家：
美国
起止时间：
2015-07-01 至 2019-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1507749&HistoricalAwards=false
关键词：
Design Self Assembly Characterization Three

项目摘要

Nontechnical Description: The micro- and nano-structured metamaterials with periodic patterns in all three dimensions can enable novel optical properties that are not attainable in naturally occurring materials. However, these metamaterials are very challenging to fabricate at micrometer length scales required to engineer the optical properties in the infrared region. This project involves the design, assembly and characterization of three-dimensional materials composed of periodic units of 0.1 to 10 micrometer in size with polyhedral geometries and precisely patterned surfaces. These metamaterials are designed to display a variety of previously unrealized properties in the mid-infrared region with potential applications for environmental monitoring, sensing, and biomedical engineering. The research results are integrated into educational curricula such as Infrared, Micro and Nanotechnologies at Johns Hopkins University. Through a number of educational activities, the project incorporates research experiences and participation of K-12 students and undergraduates including those from under-represented groups in the local Baltimore community.Technical Description: This project aims to design and characterize 3D infrared metamaterials by the self-assembly of microsized self-folded units with polyhedral geometries. The research includes the development of novel concepts such as "photonic metalattices," which combine the attractive features of metamaterials and photonic crystals, and reconfigurable metamaterials. The latter explores metamaterials that feature a chemically induced metal-insulator transition. Experimental methods include state-of-the-art nano- and micro-scale lithographic patterning, origami inspired and aggregative three-dimensional self-assembly. Furthermore, characterization using optical and electron microscopy and spectroscopy is carried out in order to investigate structural and optical properties. Simultaneously, theoretical research, based on the recently developed coupled mode methods is performed, and augmented by numerical methods to model experimental results.

非技术描述：在所有三个维度中具有周期性模式的微型和纳米结构的超材料都可以实现在自然存在的材料中无法实现的新型光学特性。但是，这些超材料的制造是非常具有挑战性的，以在红外区域设计光学特性所需的微米长度尺度。该项目涉及三维材料的设计，组装和表征，该材料由周期性单元组成0.1至10微米的尺寸，以及多面体几何形状和精确图案的表面。这些超材料旨在在中红外区域显示各种以前未实现的特性，并具有潜在的环境监测，传感和生物医学工程的应用。研究结果将约翰·霍普金斯大学（Johns Hopkins University）的红外，微技术和纳米技术等教育课程纳入。通过许多教育活动，该项目结合了K-12学生和本科生的研究经验和参与，包括来自当地巴尔的摩社区中代表性不足的群体的研究经验和参与。技术描述：该项目旨在设计和表征3D红外变质，由微型自构型单元的自构型单元与多型层层层次的自我组合。这项研究包括开发新型概念，例如“光子金属A”，这些概念结合了超材料和光子晶体的吸引力，以及可重新配置的超材料。后者探索了具有化学诱导的金属绝缘体过渡的超材料。实验方法包括最先进的纳米尺度和微尺度图案图案，折纸启发和总体三维自组装。此外，为了研究结构和光学特性，使用光学和电子显微镜以及光谱法进行表征。同时，进行了基于最近开发的耦合模式方法的理论研究，并通过数值方法进行了增强以建模实验结果。