Broadband Terahertz Polarimetry for Photonic and Biomedical Applications

用于光子和生物医学应用的宽带太赫兹偏振测量

• 批准号: 1407683
• 负责人: Dale Winebrenner
• 金额: $ 29.99万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-06-01 至 2019-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1407683&HistoricalAwards=false
• 关键词: Broadband; Terahertz; Polarimetry; Photonic; Biomedical

Proposal Title:Broadband Terahertz Polarimetry for Photonic and Biomedical AppllicationsInstitution: University of WashingtonThe proposed project will make significant contributions in imaging and sensing applications of various types of objects and materials and will contribute significantly to health monitoring, homeland security and medical applications. The broad scientific importance of terahertz technology is attested by the number of research programs and publications working to develop terahertz metrology techniques for a broad range of applications, including medical imaging, organic and polymer material science, and study of chiral molecules, amino acids and metamaterials. In particular, polarimetric methods will contribute to an understanding of physical interaction mechanisms and device physics in a range of applications. Our effort includes support for active dissemination of polarimetric capability to the broader research community. Moreover, this project is structured so as to enhance undergraduate and graduate research opportunities at the University of Washington, by providing training to student instrumentalists in terahertz polarimetric methods. Additionally, experimental results and research findings through this project will be disseminated in the form of guest lectures in a graduate-level course in Photonics. Finally, throughout this project, we will endeavor to identify and recruit female, disabled and under-represented minority students, at both undergraduate and graduate levels. Polarization measurement and ellipsometry are essential research techniques for investigating properties of new materials in many areas of basic sciences, which also find immediate industrial and biomedical applications. Broadband polarization measurement in the terahertz frequency regime presently suffers from several significant limitations: (1) Current terahertz polarimetry techniques offer only coarse polarization resolution and small isolation between orthogonal polarization channels, due in significant part to (2) poor ability to calibrate THz polarimeters, as a results of high frequency-dependent power loss in external polarizers; moreover (3) current terahertz polarimetry techniques require rotation of external polarizers to pre-determined fixed angles and positions, which burdens the system with lower measurement speed and inaccuracies in rotational polarizer placement.We propose development of a novel broadband terahertz polarimeter that combines two recent advancements in terahertz source and detector technology: A. Coherent control of complex polarizations of terahertz waves generated in gas plasmas, and B. Measurement of sample-induced ellipticity and cross-polarization using a novel full polarimetric broadband terahertz spectroscopy setup. Integrating these two techniques, we will demonstrate a polarization-agile terahertz polarimetry system capable of investigating cross-polarization and chirality of a wide variety of natural and manufactured targets. We will in particular demonstrate applications of the new polarimeter in two important applications, namely diagnosis of healthy and burned mammalian skin tissue and characterization of photonic devices based on graphene and nano-stuctured materials.

提案标题：用于光子和生物医学诉讼的宽带Terband Terahertz极化法：华盛顿大学拟议项目将为各种物体和材料的成像和感应应用做出重大贡献，并将为健康监测，国土安全和医疗应用做出重大贡献。 Terahertz技术的广泛科学重要性得到了研究计划和出版物的数量，旨在开发针对广泛应用的Terahertz计量技术，包括医学成像，有机和聚合物材料科学，以及手掌分子，氨基酸，氨基酸和材料的研究。特别是，极化方法将有助于理解一系列应用中的物理相互作用机制和设备物理。我们的努力包括支持对更广泛的研究社区积极传播极化能力的支持。此外，该项目的结构化，以通过向Terahertz Polarimetric方法提供培训来增强华盛顿大学的本科和研究生研究机会。此外，通过该项目的实验结果和研究结果将以光子学研究生级课程的嘉宾讲座的形式传播。最后，在整个项目中，我们将努力在本科和研究生级别识别和招募女性，残疾和代表性不足的少数族裔学生。 极化测量和椭圆法是研究基本科学领域的新材料特性的必不可少的研究技术，这些技术也发现了直接的工业和生物医学应用。 Terahertz频率制度中的宽带极化测量目前受到了几个重大局限性：（1）当前的Terahertz极化技术仅提供粗极的偏振分辨率和正交极化渠道之间的微小隔离，这在很大程度上归因于（2）（2）较差的能力，无法校准极性损失的较高频率损失的损失，而异性损失的损失损失了，而异性差异损失了。此外，（3）当前的Terahertz极化技术需要将外部极化器旋转到预定的固定角度和位置，这使系统的测量速度较低，并且在旋转偏振层的位置中的测量速度和不准确性。我们建议开发新的宽带Terahert terahertimeter，该宽带Terahert北极偏光层结合了Terector Complacter and Dettorty A. Terector and Detector o. Terector and Detector o. Detector o. Detector o. Detector o. Detector a。在气体等离子体中产生的Terahertz波，并使用新型的全偏振宽带Terahertz光谱设置来测量样品诱导的椭圆度和交叉极化。整合了这两种技术，我们将展示一个能够研究各种天然和制造靶标的交叉极化和手性的偏振型Terahertz极化系统。我们特别会证明新偏振仪在两种重要应用中的应用，即诊断健康和燃烧的哺乳动物皮肤组织以及基于石墨烯和纳米构成材料的光子设备的表征。