THz Surface Waves, Waveguide THz-TDS and the 2D-TEM Plane

太赫兹表面波、波导 THz-TDS 和 2D-​​TEM 平面

• 批准号: 0757680
• 负责人: Daniel Grischkowsky
• 金额: $ 44.95万
• 依托单位: Oklahoma State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-06-01 至 2014-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0757680&HistoricalAwards=false
• 关键词: THz; Surface; Waves; Waveguide; TDS

This experimental research program will explore fundamental optical physics and applications using far-infrared terahertz (THz) radiation. The PI has previously extended the concept and utility of parallel-plate waveguides to that of a much larger two-dimensional plane. Within this plane two-dimensional quasi-optical elements have demonstrated THz guiding and diffraction. This project will investigate optical physics with recently designed two-dimensional quasi-optical components with negative index of refraction. Researchers will measure the refractive properties and assess the utility of these extremely dispersive components. In addition, the program will experimentally measure and theoretically study the propagation of THz surface electromagnetic waves (plasmons) on planar subwavelength arrays of holes in thin metal films. The experiments are designed to resolve a discrepancy with the theoretically predicted very large transverse extent of the THz surface plasmons and previously observed transmission through hole arrays. The program will transform the previously developed technique of waveguide THz Time-Domain Spectroscopy into a new spectral analysis technique with high sensitivity and frequency resolution for sensing and measuring the properties of thin layers of material. This sensing technology is of great technological importance and the techniques are of major interests to many fields including organic chemistry and molecular biology. The researchers will assess the comparative strengths of sensing techniques using surface plasmons or parallel-plate waveguides in the THz spectral range. The versatility and usefulness of the two-dimensional waveguide plane for reduced scale instrumentation will be demonstrated. This project will also provide multidisciplinary research training for students and postdoctoral researchers in optical science, terahertz physics, and molecular sensing.

该实验研究计划将探索使用远红外太赫兹（THz）辐射的基础光学物理和应用。PI先前已经将平行板波导的概念和实用性扩展到更大的二维平面。 在这个平面内，二维准光学元件已经证明了太赫兹的引导和衍射。 本计画将利用最近设计的具有负折射率的二维准光学元件来研究光学物理。 研究人员将测量折射特性，并评估这些极度色散组件的效用。 此外，该计划将实验测量和理论研究太赫兹表面电磁波（等离子体激元）在金属薄膜中的平面亚波长孔阵列上的传播。实验的目的是解决与理论预测的太赫兹表面等离子体激元和以前观察到的传输通过孔阵列的非常大的横向范围的差异。 该计划将把以前开发的波导THz时域光谱技术转变为一种新的光谱分析技术，具有高灵敏度和频率分辨率，用于传感和测量薄层材料的特性。 该传感技术具有重要的技术意义，并且该技术在包括有机化学和分子生物学在内的许多领域都具有重大意义。研究人员将评估在太赫兹光谱范围内使用表面等离子体或平行板波导的传感技术的比较优势。 二维波导平面的多功能性和实用性，减少规模的仪器将被证明。 该项目还将为光学科学，太赫兹物理和分子传感领域的学生和博士后研究人员提供多学科研究培训。