Widely Tunable Cavity-Enhanced Ultrafast Spectroscopy and the Dynamics of Hydrogen Bond Networks

宽可调腔增强超快光谱和氢键网络动力学

• 批准号: 1708743
• 负责人: Thomas Allison
• 金额: $ 50.19万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-01 至 2022-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1708743&HistoricalAwards=false
• 关键词: Widely; Tunable; Cavity; Enhanced; Ultrafast

With support from the Chemical Measurement and Imaging Program in the Division of Chemistry, Professor Allison and his research group at Stony Brook University further develop a new type of spectrometer for recording the behavior of gas molecules. In particular, Professor Allison records snapshots of the vibrations of hydrogen bonds between water molecules when a few water molecules stick together in a ring but are otherwise isolated from the environment. These snapshots of simple systems help to understand how the motions of hydrogen atoms in more complex networks such as liquid water are coupled to one another. The information allows scientists to make better computer models of hydrogen-bonded matter. The new ultrafast spectrometers developed by the Allison Lab will be able to record signals from much more dilute samples than currently possible. Professor Allison's techniques, once developed, can be used to study motions of other molecular systems and find many uses in fundamental and applied research. For example, the developed technique could allow scientists to study how water molecules interact with each other to understand how clouds form or to study how protein molecules interact with their surrounding molecules to understand enzymatic functions in biological processes.Professor Allison works with graduate and undergraduate students closely in the research. He also participates in a school summer program on campus targeting high school students. Ultrafast optical spectroscopy methods, such as transient absorption spectroscopy and two-dimensional spectroscopy, are widely used across many disciplines. However, these techniques have been typically restricted to optically thick samples, such as solids and liquid solutions. Professor Allison and his group work on a widely tunable cavity-enhanced ultrafast spectrometer and apply it to the dynamics of elementary hydrogen bond networks. This involves substantial instrument development in concert with a series of experiments on jet-cooled gas-phase molecules and clusters. Cavity-enhanced two-dimensional infrared (CE-2DIR) spectroscopy is another technique to be developed to study hydrogen-bonded carboxylic acid dimers. The study of small deuterated water clusters will provide critical data for understanding and modeling the complexities of liquid water. The development of a widely tunable cavity-enhanced ultrafast spectrometer is expected to open new opportunities for many future applications where classic ultrafast spectroscopy has been limited by its sensitivity and spectral information. The project provides students involved in the project with an interdisciplinary research opportunity. Professor Allison also participates in the University's laser teaching center for the outreach to high school students and general publics.

在化学系化学测量和成像项目的支持下，斯托尼布鲁克大学的Allison教授和他的研究小组进一步开发了一种新型的光谱仪，用于记录气体分子的行为。特别是，艾利森教授记录了水分子之间氢键振动的快照，当几个水分子粘在一起形成一个环，但与环境隔离时。这些简单系统的快照有助于理解氢原子在更复杂的网络（如液态水）中的运动如何相互耦合。这些信息使科学家能够更好地建立氢键物质的计算机模型。艾里逊实验室开发的新型超快光谱仪将能够记录比目前更稀的样品的信号。艾利森教授的技术，一旦开发，可用于研究其他分子系统的运动，并在基础和应用研究中找到许多用途。 例如，开发的技术可以让科学家研究水分子如何相互作用，以了解云是如何形成的，或者研究蛋白质分子如何与周围的分子相互作用，以了解生物过程中的酶功能。Allison教授与研究生和本科生密切合作进行研究。他还参加了一个针对高中生的校园暑期项目。超快光谱学方法，如瞬态吸收光谱学和二维光谱学，广泛应用于许多学科。然而，这些技术通常限于光学厚的样品，例如固体和液体溶液。Allison教授和他的团队致力于一种可广泛调谐的腔增强超快光谱仪，并将其应用于基本氢键网络的动力学。这涉及大量的仪器开发与一系列的实验喷射冷却的气相分子和集群。腔增强二维红外光谱（CE-2DIR）是另一种研究氢键羧酸二聚体的技术。小氘水团簇的研究将为理解和模拟液态水的复杂性提供关键数据。广泛可调谐腔增强型超快光谱仪的发展有望为许多未来的应用开辟新的机会，经典的超快光谱学受到其灵敏度和光谱信息的限制。该项目为参与该项目的学生提供了跨学科研究的机会。艾利森教授还参加了大学的激光教学中心，为高中生和普通公众提供服务。

项目成果

Broadband ultraviolet-visible frequency combs from cascaded high-harmonic generation in quasi-phase-matched waveguides

准相位匹配波导中级联高次谐波产生的宽带紫外-可见光频率梳

• DOI: 10.1364/josab.427086
• 发表时间: 2021
• 期刊: Journal of the Optical Society of America B
• 作者: Rutledge, Jay;Catanese, Anthony;Hickstein, Daniel D.;Diddams, Scott A.;Allison, Thomas K.;Kowligy, Abijith S.
• 通讯作者: Kowligy, Abijith S.

Mid-Infrared Frequency Comb Generation and Spectroscopy with Few-Cycle Pulses and χ(2) Nonlinear Optics

• DOI: 10.1103/physrevlett.124.133904
• 发表时间: 2020-04-01
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Lind, Alexander J.;Kowligy, Abijith;Diddams, Scott A.
• 通讯作者: Diddams, Scott A.

Widely tunable cavity-enhanced frequency combs

宽范围可调腔增强频率梳

• DOI: 10.1364/ol.389412
• 发表时间: 2020
• 期刊: Optics Letters
• 影响因子: 3.6
• 作者: Silfies, Myles C.;Kowzan, Grzegorz;Chen, Yuning;Lewis, Neomi;Hou, Ryan;Baehre, Robin;Gross, Tobias;Allison, Thomas K.
• 通讯作者: Allison, Thomas K.

Mid-infrared frequency comb with 6.7 W average power based on difference frequency generation

• DOI: 10.1364/ol.385294
• 发表时间: 2020-03-01
• 期刊: OPTICS LETTERS
• 影响因子: 3.6
• 作者: Catanese, Anthony;Rutledge, Jay;Allison, Thomas K.
• 通讯作者: Allison, Thomas K.

Tunable visible frequency combs from a Yb-fiber-laser-pumped optical parametric oscillator

• DOI: 10.1007/s00340-019-7191-2
• 发表时间: 2019-01
• 期刊: Applied Physics B
• 作者: Yuning Chen;Myles C Silfies;G. Kowzan;J. M. Bautista;T. Allison