Frequency-Agile Terahertz Spectrometry for Advanced Chemical Sensing

用于先进化学传感的捷变频太赫兹光谱测量

• 批准号: 1305931
• 负责人: Mona Jarrahi
• 金额: $ 36万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-07-01 至 2016-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1305931&HistoricalAwards=false
• 关键词: Frequency; Agile; Terahertz; Spectrometry; Advanced

The objective of this program is to develop a new generation of room-temperature terahertz spectrometers with significant bandwidth increase compared to existing technologies for advanced chemical sensing. For this purpose, a novel plasmonic heterodyne spectrometer concept will be investigated which replaces the terahertz local oscillator of traditional heterodyne receivers by a near infrared local oscillator with a terahertz envelope. Unique capabilities of plasmonic antennas are key in this innovation, which enable efficient coupling of the near infrared local oscillator and terahertz signal into the semiconductor nanostructures that are specifically designed to allow direct mixing of the local oscillator and terahertz signal. The intellectual merit of the proposed work is an entirely new heterodyne terahertz spectrometer architecture that uses a near infrared local oscillator instead of the terahertz local oscillator employed in conventional heterodyne terahertz spectrometers. Near infrared local oscillators offer orders of magnitude higher power, wider frequency tunability, and narrower linewidth compared with terahertz local oscillators, leading to a significant improvement in spectrometer sensitivity, operation bandwidth and spectral resolution at room temperature. The broader impacts of the proposed research are developing high performance systems for biomedical sensing, pharmaceutical quality control, air pollution control, and security screening, as well as developing an education/outreach program for increasing the supply of terahertz engineers and scientists through new graduate and undergraduate courses, K12 activities, recruitment and retention of under-represented minorities.

该程序的目的是与现有的高级化学感应技术相比，开发新一代的室温terahertz光谱仪，带宽显着增加。为此，将研究一个新型的等离激元杂音仪概念，该概念将取代用Terahertz包膜的近红外局部振荡器的Terahertz局部振荡器传统的杂化接收器的局部振荡器。等离子天线的独特功能是这项创新的关键，它可以有效地将近红外局部振荡器和Terahertz信号耦合到半导体纳米结构中，这些纳米结构是专门设计的，允许直接混合局部振荡器和Terahertz信号。拟议作品的智力优点是一种全新的杂种Terahertz光谱仪体系结构，它使用了近红外的本地振荡器，而不是在传统的杂化Terahertz光谱仪中使用的Terahertz本地振荡器。与Terahertz局部振荡器相比，近红外本地振荡器提供更高的功率，更广泛的频率可调性和较窄的线宽，从而在室温下可显着提高光谱仪灵敏度，操作带宽和光谱分辨率。拟议研究的更广泛的影响是开发高性能系统，用于生物医学感应，药物质量控制，空气污染控制和安全筛查，以及开发一种教育/外展计划，以通过新的研究生和本科课程，K12活动，招聘和招聘，招聘和保留不足的人，以增加Terahertz工程师和科学家的供应。