Instrument Development: A Miniature, High-resolution, Stationary Grating Spatial Heterodyne UV Raman Spectrometer-Towards Miniature UV Raman Sensors and "Raman on a Chip"

仪器开发：微型、高分辨率、固定光栅空间外差紫外拉曼光谱仪——迈向微型紫外拉曼传感器和“芯片上的拉曼”

• 批准号: 1308211
• 负责人: Stanley Angel
• 金额: $ 44.15万
• 依托单位: University of South Carolina at Columbia
• 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: 2013-09-01 至 2017-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1308211&HistoricalAwards=false
• 关键词: Instrument; Development; Miniature; resolution; Stationary

With support from the Chemical Measurement and Imaging program in the Division of Chemistry, Prof. Stanley M. Angel and his students at the University of South Carolina, will develop miniature deep-UV Raman spectrometers of unprecedentedly small size. The miniature Raman spectrometer design is based on a stationary grating, spatial heterodyne spectrometer (SHS) and will have high spectral resolution, a large spectral range and high light throughput. The proposed UV Raman spectrometer is a radically new design that allows mm-size spectrometers with spectral characteristics equal to or better than larger instruments and with higher light throughput than conventional Raman instruments of comparable size, and with high acceptance angle. The proposed work is designed to move towards miniature Raman chemical sensors. The spectrometer will substantially broaden the applicability of Raman for on-line, in-situ, in-vivo, and standoff measurements, in wide-ranging applications. This project will include studies in four major areas: 1) what are the fundamental size limitations of a SHS based Raman spectrometer, 2) how do noise and background sources scale with instrument size, 3) how can an interferometer output be coupled to an external detector, and 4) what new applications are made possible by the availability of a miniature UV Raman spectrometer. The implications of on-line spectroscopic sensors to chemical process monitoring and advanced and additive manufacturing will be explored. Raman spectrometers provide information about the molecular composition of samples by recording small changes in the wavelength (color) of incident light produced by molecular vibrations in the sample. In this project, miniature spectroscopic tools will be developed using cutting-edge technology, opening up whole new areas of analytical measurement possibilities because the small size and UV spectroscopic performance of the miniature SHRS proposed will substantially broaden the range of Raman spectrometer applications. Areas of potential use include chemical process monitoring, on-line chemical kinetics measurements, imaging of biological tissues and cells, standoff forensics analysis, planetary exploration, hand held geological instruments, deep-ocean oceanographic measurements, electronics device characterization, high explosives detection, and many others. This project also provides outstanding opportunities for undergraduates and graduate students to acquire knowledge and skills in spectroscopy, lasers and optics as well as applications of analytical chemistry.

在化学系化学测量和成像项目的支持下，南卡罗来纳大学的Stanley M. Angel教授和他的学生将开发出尺寸空前小的微型深紫外拉曼光谱仪。微型拉曼光谱仪的设计基于固定光栅空间外差光谱仪（SHS），具有高光谱分辨率、大光谱范围和高光吞吐量。提出的紫外拉曼光谱仪是一种全新的设计，允许毫米尺寸的光谱仪具有等于或优于大型仪器的光谱特性，并且具有比同等尺寸的传统拉曼仪器更高的光通量，并且具有高接收角。提出的工作旨在向微型拉曼化学传感器发展。该光谱仪将大大拓宽拉曼光谱在在线、原位、体内和现场测量方面的适用性，应用范围广泛。该项目将包括四个主要领域的研究：1)基于SHS的拉曼光谱仪的基本尺寸限制是什么，2)噪声和背景源如何与仪器尺寸进行缩放，3)干涉仪输出如何与外部探测器耦合，以及4)微型紫外拉曼光谱仪的可用性使哪些新应用成为可能。在线光谱传感器对化学过程监测和先进增材制造的影响将被探讨。拉曼光谱仪通过记录样品中分子振动产生的入射光波长（颜色）的微小变化，提供有关样品分子组成的信息。在这个项目中，微型光谱工具将使用尖端技术开发，开辟全新的分析测量领域的可能性，因为微型SHRS的小尺寸和紫外光谱性能将大大拓宽拉曼光谱仪的应用范围。潜在的应用领域包括化学过程监测、在线化学动力学测量、生物组织和细胞成像、现场取证分析、行星探测、手持地质仪器、深海海洋学测量、电子设备表征、高炸药探测等。该项目还为本科生和研究生提供了获得光谱学、激光和光学以及分析化学应用知识和技能的绝佳机会。