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Broadband Two-Photon Absorption Spectroscopy for High-Repetition-Rate Lasers

高重复率激光器的宽带双光子吸收光谱

基本信息

批准号：
1905334
负责人：
Christopher Elles
金额：
$ 39.78万
依托单位：
University of Kansas Center for Research Inc
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-08-01 至 2024-01-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1905334&HistoricalAwards=false
关键词：
Broadband Two Photon Absorption Spectroscopy

项目摘要

Broadband Two-Photon Absorption Spectroscopy for High-Repetition Rate Lasers With support from the Chemical Measurement and Imaging Program in the Division of Chemistry, Professor Christopher Elles and his group at the University of Kansas are working to develop and implement new laser-based methods to measure and characterize the properties of molecules. The activation of molecules using intense laser pulses has important applications in many research fields, ranging from microscopic imaging of biological samples to the development of high-density optical data storage media. However, the best methods currently available for these applications are only accessible to research groups with specialized technical expertise, which are not necessarily the groups who make the materials. Working with both graduate and undergraduate students, Professor Elles is developing new techniques and instrumentation that will make these sophisticated measurements more widely accessible to the research community. By simplifying the process for characterizing the properties of laser-activated molecules, this work enables more rapid development of new compounds and new technologies, including diagnostic and therapeutic biomedical applications. The project also includes an integrated educational outreach program to help current and future high school science teachers develop new teaching materials that incorporate key concepts from contemporary research and address the Next Generation Science Standards (NGSS).The research team is developing more widely accessible methods for measuring broadband two-photon absorption (2PA) spectra using high-repetition rate femtosecond lasers. Current methods to measure 2PA spectra, including z-scan and two-photon excited fluorescence (2PEF), are limited to single-wavelength measurements and are not easily implemented by groups that do not specialize in nonlinear spectroscopy. To overcome these limitations, the group is working to design an integrated, one-box spectrometer that can be coupled with any existing femtosecond pulsed laser system to quickly and easily obtain accurate 2PA spectra, providing a valuable new tool for molecular spectroscopy. The team is working to develop new capabilities that include accurate absolute 2PA cross-sections, single-shot data acquisition, and on-the-fly imaging of 2PA spectra.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

高重复频率激光器的宽带双光子吸收光谱在化学系化学测量和成像项目的支持下，堪萨斯大学的Christopher Elles教授和他的团队正在努力开发和实施新的基于激光的方法来测量和表征分子的性质。使用强激光脉冲激活分子在许多研究领域具有重要的应用，从生物样品的显微成像到高密度光学数据存储介质的开发。然而，目前可用于这些应用的最佳方法仅适用于具有专业技术知识的研究小组，而这些研究小组不一定是制造材料的小组。与研究生和本科生一起工作，Elles教授正在开发新的技术和仪器，使这些复杂的测量更广泛地为研究界所用。通过简化表征激光激活分子性质的过程，这项工作能够更快地开发新化合物和新技术，包括诊断和治疗生物医学应用。该项目还包括一个综合的教育推广计划，以帮助当前和未来的高中科学教师开发新的教材，纳入当代研究的关键概念，并解决下一代科学标准（NGSS）。研究小组正在开发更广泛的方法来测量宽带双光子吸收（2PA）光谱使用高重复率飞秒激光。目前测量2PA光谱的方法，包括z扫描和双光子激发荧光（2PEF），仅限于单波长测量，并且不容易由不擅长非线性光谱学的团体实施。为了克服这些限制，该小组正在努力设计一种集成的单箱光谱仪，可以与任何现有的飞秒脉冲激光系统耦合，以快速轻松地获得准确的2PA光谱，为分子光谱学提供有价值的新工具。该团队正在努力开发新的能力，包括精确的绝对2PA横截面，单次数据采集和2PA光谱的实时成像。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（4）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Broadband Two-Photon Absorption Spectroscopy with Stimulated Raman Scattering as an Internal Standard

以受激拉曼散射作为内标的宽带双光子吸收光谱

DOI：
10.1021/acs.analchem.3c02298
发表时间：
2023
期刊：
Analytical Chemistry
影响因子：
7.4
作者：
Srivastava, Prasenjit;Stierwalt, David A.;Elles, Christopher G.
通讯作者：
Elles, Christopher G.

Trifluoromethylative Bifunctionalization of Alkenes via a Bibenzothiazole-Derived Photocatalyst under Both Visible- and Near-Infrared-Light Irradiation

DOI：
10.1021/acscatal.3c01812
发表时间：
2023-06
期刊：
ACS Catalysis
影响因子：
12.9
作者：
Bidyut Kumar Kundu;Chuan-qiang Han;Prasenjit Srivastava;Siddhant Nagar;Katie E. White;J. Krause;C. Elles;Yujie Sun
通讯作者：
Bidyut Kumar Kundu;Chuan-qiang Han;Prasenjit Srivastava;Siddhant Nagar;Katie E. White;J. Krause;C. Elles;Yujie Sun

Absolute Cross Sections of Liquids from Broadband Stimulated Raman Scattering with Femtosecond and Picosecond Pulses