RUI: Experimental Studies of Isotropic Disordered Photonic Band Gap Structures
RUI:各向同性无序光子带隙结构的实验研究
基本信息
- 批准号:1308084
- 负责人:
- 金额:$ 40万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2013
- 资助国家:美国
- 起止时间:2013-07-01 至 2018-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Technical Description: The goal of this project is to understand electromagnetic wave propagation in disordered photonic media and to uncover novel mechanisms that control and guide light in a new class of engineered disordered photonic band gap materials. In contrast to the conventional photonic bandgap formation theory, it has been recently predicted by the PI and her collaborators that a large isotropic complete energy gap (forbidden frequencies for all polarization), rather than a mobility gap associated with localized states, exists in certain hyperuniform disordered dielectric systems. In this research project, the PI and her laboratory bridge two areas previously considered separate: photonic bandgap, usually associated with periodicity (Bragg's scattering), and light localization, usually associated with disordered systems. They use microwave and centimeter-scale samples to uncover the nature of various electromagnetic wave modes (photonic states) in the disordered materials, measure bandgap width, robustness and dispersion, and compare their dependence on the geometry of the disordered structures to determine the properties essential for photonic bandgap formation. By exploring the functional waveguide and cavity architecture in these systems, the PI's laboratory tests these disordered bandgap structures as isotropic platforms for freeform optical circuits and demonstrates their advantages over photonic crystals in controlling photon propagation. The PI also fabricates and characterizes these disordered structures at sub-micrometer scale to explore their properties and applications in the infrared.Non-technical Description: Photonic bandgap materials are artfully made materials designed to manipulate light propagation and have applications in many fields, including signal processing, telecommunication, lasering and solar-energy harvesting. This research project lays the experimental foundation for using isotropic disordered photonic bandgap materials for applications at microwave and infrared frequencies. The isotropic disordered photonic bandgap materials offer flexibility and versatility in device design that are prohibited by the crystalline structures in conventional photonic bandgap materials. They have a potential to advance the abilities to control and guide light and to impact the photonics industry by inventing novel photonic devices. This project integrates education and research and incorporates the research methods and results into lecture and laboratory courses at San Francisco State University (SFSU). It offers opportunities for research and career development to SFSU students and greatly enriches the learning experience of students, including large numbers of minority and economically challenged students. The PI reaches out to California educators to recruit, train, and nurture the professional development of K-12 and college teachers preparing them to integrate modern optics, materials science, and advanced geometry into their teaching, thereby enriching the education of many K-12 and college students from diverse backgrounds.
技术描述:该项目的目标是了解电磁波在无序光子介质中的传播,并揭示在新型工程无序光子带隙材料中控制和引导光的新机制。与传统的光子带隙形成理论不同,PI和她的合作者最近预测,在某些超均匀无序介电系统中,存在大的各向同性完全能隙(所有偏振的禁止频率),而不是与局域态相关的迁移率间隙。在这项研究项目中,PI和她的实验室连接了两个以前被认为是分开的领域:光子带隙,通常与周期性(布拉格散射)有关,以及光局部化,通常与无序系统有关。他们使用微波和厘米尺度的样品来揭示无序材料中各种电磁波模式(光子态)的本质,测量带隙宽度、稳健性和色散,并比较它们对无序结构几何的依赖关系,以确定形成光子带隙所必需的性质。通过探索这些系统中的功能波导和腔结构,PI的实验室测试了这些无序带隙结构作为自由形状光学电路的各向同性平台,并展示了它们在控制光子传播方面的优势。非技术描述:光子带隙材料是一种巧妙地设计来操纵光传播的材料,在许多领域都有应用,包括信号处理、电信、激光和太阳能收集。本研究为将各向同性无序光子带隙材料应用于微波和红外波段奠定了实验基础。各向同性无序光子带隙材料为器件设计提供了灵活性和通用性,这是传统光子带隙材料中晶体结构所不允许的。它们有可能提高控制和引导光的能力,并通过发明新的光子设备来影响光电子业。该项目将教育和研究融为一体,并将研究方法和结果纳入旧金山州立大学(SFSU)的讲座和实验室课程。它为旧金山州立大学的学生提供了研究和职业发展的机会,并极大地丰富了学生的学习经验,包括大量的少数民族和经济困难学生。国际学生联合会与加州教育工作者进行接触,招募、培训和培养K-12和大学教师的专业发展,为他们将现代光学、材料科学和高级几何融入他们的教学做好准备,从而丰富了许多来自不同背景的K-12和大学生的教育。
项目成果
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