MRI: Development of a high energy, ultrabroadband, ultrashort infrared laser source

MRI：开发高能、超宽带、超短红外激光源

• 批准号: 1337880
• 负责人: Eric Borguet
• 金额: $ 57.5万
• 依托单位: Temple University
• 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: 2013-09-15 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1337880&HistoricalAwards=false
• 关键词: MRI; Development; energy; ultrabroadband; ultrashort

With this award from the Chemistry Major Research Instrumentation (MRI) Program that is co-funded by the Chemistry Research Instrumentation and Facilities (CRIF) Program, Professor Eric Borguet from Temple University in collaboration with his colleagues Hai-Lung Dai, Robert Stanley and Robert Levis will develop an instrument capable of acting as a high energy, ultrabroadband source of ultrashort infrared (IR) pulses at wavelengths beyond 2500 nm by pumping nonlinear optical materials such as AgGaS2 and AgGaSe2. This new system will produce attosecond pulses that will allow study of electron motions in atoms and molecules in real time. This mid-infrared pulsed laser source will open a window for exploration of materials, biomolecules and chemical reactions. The system will build upon existing techniques including non-collinear optical parameter amplification (NOPA). This new source will allow researchers to do new types of nonlinear experiments such as mutidimensional IR spectroscopy and interface sensitive vibrational sum frequency spectroscopy. Intense mid-IR photons will extend the cut-off energy in high-harmonic generation (HHG) processes deeper into the X-ray region. The proposal is aimed at enhancing research and education at all levels, especially in areas such as (a) nonlinear optical spectroscopy of interfaces; (b) multidimensional infrared spectroscopy; (c) sum frequency generation vibrational spectroscopy of colloid interfaces; (d) ultrabroadband infrared spectroscopy of photobiological processes; (e) filamentation with IR pulses; (f) coherent control via vibrational excitation; and (g) long-wavelength ultrashort pulse sources as a driver of high-harmonic generation.The laser system to be developed will generate electromagnetic radiation, light, in the infrared region of extremely short duration, attoseconds. This is one quintillionth of a second. To put this into perspective, an attosecond is to a second, what a second is to about 32 billion years. This type of light can directly excite the vibrational motion of molecules and the subsequent distribution of this energy into a material. This technique advances ultrafast laser technology. As the field grows, the significance of molecular phenomena on time scales of attoseconds and shorter is being realized. Arguably, some of the most fundamental processes in chemistry (e.g., bond breaking and formation, electron transfer, and others) occur on these ultrafast time scales. This development effort will create a new instrument with high versatility that will be used in the growing field of ultrafast spectroscopy. The instrument is part of a program to develop a strong ultrafast spectroscopic capability to stimulate a number of research programs as well as to provide a base for collaborations with colleagues. These unique attributes indicate that the new instrument will have broad applicability across many fields. During development, construction, testing and commissioning of the instrument many students will participate. This will provide a rich training experience in the growing field of ultrafast methodology while allowing study of unstable reaction products or excited states of molecules, and at the same time determining their structure while combining spectroscopy (giving structural information) and dynamics (revealing details of the reactive events).

通过化学研究仪器（MRI）计划的奖项，该计划由化学研究工具和设施（CRIF）计划共同提供，来自坦普尔大学的埃里克·鲍尔基特（Eric Borguet）教授与他的同事Hai-lung Dai，Robert Stanley和Robert Levis合作，将开发出25种功能超出能源的Ultraband Infrser Rerfres dulever birband byrared byrarred byrrorrared byerrare infrrrrorrare，泵送非线性光学材料，例如Aggas2和Aggase2。这个新系统将产生量强的脉冲，以实时研究原子和分子中的电子运动。这种中红外脉冲激光源将为探索材料，生物分子和化学反应的窗口打开窗口。该系统将基于现有技术，包括非共线光学参数放大（NOPA）。该新来源将使研究人员可以进行新型的非线性实验，例如肌关系IR光谱和界面敏感振动总和频率光谱。强烈的IR光子将在X射线区域更深入地扩展高谐波生成（HHG）过程中的截止能量。该提案旨在增强各个级别的研究和教育，尤其是在（a）界面非线性光谱等领域； （b）多维红外光谱； （C）胶体界面的总和产生频率振动光谱； （d）光生过程的超人频道红外光谱； （e）用红外脉冲的细丝； （f）通过振动激发连贯的控制； （g）长波长超短脉冲源是高谐波生成的驱动力。要开发的激光系统将在极短的持续时间的红外区域（toseconds）产生电磁辐射，光线。这是一秒钟的一千万千万。从这个角度来看，一个方面是一秒钟，这是一秒钟，大约是320亿年。这种类型的光可以直接激发分子的振动运动以及随后的该能量分布到材料中。该技术推进了超快激光技术。随着场的增长，分子现象在attoseconds和Shorter的时间尺度上的重要性正在实现。可以说，在这些超快时间尺度上，化学中一些最基本的过程（例如，键断裂和形成，电子转移等）发生在这些过程中。这种开发工作将创建一种具有高多功能性的新仪器，该仪器将用于超快光谱的增长领域。该仪器是开发强大超快光谱能力的计划的一部分，以刺激许多研究计划，并为与同事的合作提供基础。这些独特的属性表明，新仪器将在许多领域具有广泛的适用性。在开发，建设，测试和调试乐器期间，许多学生将参加。这将在超快方法的增长领域提供丰富的培训经验，同时允许研究不稳定的反应产物或分子激发态，同时确定它们的结构，同时结合光谱（提供结构信息）和动力学（揭示了反应性事件的细节）。