MRI: Acquisition of an ultrafast amplified laser system for nonlinear optics and time-resolved spectroscopic studies of condensed matter systems

MRI：获取用于非线性光学和凝聚态系统的时间分辨光谱研究的超快放大激光系统

• 批准号: 1827846
• 负责人: Suchismita Guha
• 金额: $ 35.23万
• 依托单位: University of Missouri-Columbia
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-10-01 至 2021-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1827846&HistoricalAwards=false
• 关键词: MRI; Acquisition; ultrafast; amplified; laser

This Major Research Instrumentation award supports the acquisition of an ultrafast amplified laser system enabling studies at the intersections of condensed matter systems in physics, materials science and engineering, chemistry, chemical engineering, biology, and bioengineering. Probing materials with ultrafast short laser pulses captures some of the most fundamental physical processes that occur at extremely short timescales. These processes, which the project addresses, provide insights into charge transfer and evolution of optical excitations in solar cells, nonlinear optical phenomena in organic electronics, quantum materials, and (bio)organic materials, and transient optical processes in mesoporous materials. The ultrafast laser facility, while enhancing areas of nonlinear optics and time-resolved spectroscopic studies of condensed matter systems, complements existing research centers involved with nanomedicine, nanotechnology, and nanoscience at the University of Missouri (MU). The project seeks to make ultrafast laser technology available to a large user base at MU and in the state of Missouri. The versatility of the instrument and the transdisciplinary breadth of available expertise are unmatched in the region, empowering STEM students to obtain a competitive edge by hands-on experiences, and preparing them for employment in nanotechnology, biotechnology, materials science and engineering, and semiconductor-based academic research or industry. The research and educational activities are strengthened by the participation of students and researchers from Lincoln University, a Historically Black College & University in Missouri, and other institutions in the state along with advancing ongoing efforts in high school mentorship and middle school outreach programs.Ultrashort light pulses open up new realms for probing nonlinear optical processes in materials and electronic devices. The proposed system is a versatile femtosecond laser system with broadband wavelength tunability and capabilities for multi-dimensional spectroscopy. It consists of three parts: (a) a femtosecond oscillator (mode-locked Ti-Sapphire laser); (b) a femtosecond amplifier; (c) a non-collinear optical parametric amplifier. The project focuses on investigating carrier dynamics and optical nonlinearities in electronic materials and organic semiconductor transistors to improve technology based on organic electronics. The research of two-dimensional (2D) materials, in particular the monolayer transition metal dichalcogenides, will benefit by obtaining in-depth understanding of the excitonic processes in these materials. In the area of molecular organic crystals, combined efforts in the second harmonic generation measurements, synthesis, and computational simulations will establish large scale polar order by rational design. The ultrafast laser system will be used to exploit the nonlinear optical properties of biological nanostructures in order to obtain multi-wavelength coherent sources with potential applications in nanophotonics. The project will further enable the development of silica-based materials by probing transient optical processes and fabricating micro- and nano-structures on the order necessary for their integration into optoelectronic devices. The proposed experimental laser facility will be bolstered by establishing a center for nonlinear optics, comprising both experimentalists and theorists, to promote research and educational activities in emerging ultrafast and nonlinear optical phenomena in condensed matter systems.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.

该主要研究仪器奖支持获得一个超快放大激光系统，用于物理学、材料科学与工程、化学、化学工程、生物学和生物工程中凝聚态系统的交叉研究。用超快的短激光脉冲探测材料，可以捕捉到在极短的时间尺度内发生的一些最基本的物理过程。该项目涉及的这些过程，为太阳能电池中的电荷转移和光激发的演变、有机电子、量子材料和（生物）有机材料中的非线性光学现象以及介孔材料中的瞬态光学过程提供了见解。这个超快激光设备，在加强凝聚态系统的非线性光学和时间分辨光谱研究领域的同时，补充了密苏里大学（MU）现有的纳米医学、纳米技术和纳米科学研究中心。该项目旨在为MU和密苏里州的大量用户提供超快激光技术。该仪器的多功能性和跨学科专业知识的广度在该地区是无与伦比的，使STEM学生能够通过实践经验获得竞争优势，并为他们在纳米技术，生物技术，材料科学与工程以及基于半导体的学术研究或行业就业做好准备。来自林肯大学、密苏里州一所历史悠久的黑人学院和大学以及该州其他机构的学生和研究人员的参与加强了研究和教育活动，同时推进了高中指导和中学推广项目的持续努力。超短光脉冲为探测材料和电子器件中的非线性光学过程开辟了新的领域。该系统是一种多用途飞秒激光系统，具有宽带波长可调性和多维光谱能力。它由三个部分组成：(a)飞秒振荡器（锁模钛蓝宝石激光器）；(b)飞秒放大器；(c)非共线光参量放大器。该项目重点研究电子材料和有机半导体晶体管中的载流子动力学和光学非线性，以改进基于有机电子学的技术。对二维（2D）材料，特别是单层过渡金属二硫族化合物的激子过程的深入了解将有利于这些材料的研究。在分子有机晶体领域，二次谐波产生的测量、合成和计算模拟的综合努力将通过合理的设计建立大尺度的极性秩序。超快激光系统将用于开发生物纳米结构的非线性光学特性，以获得在纳米光子学中具有潜在应用价值的多波长相干光源。该项目将进一步推动硅基材料的发展，通过探测瞬态光学过程，并按其集成到光电器件所需的顺序制造微纳米结构。拟议的实验激光设备将通过建立一个非线性光学中心得到支持，该中心由实验学家和理论家组成，以促进凝聚态系统中新兴的超快和非线性光学现象的研究和教育活动。该奖项反映了美国国家科学基金会的法定使命，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

Coupling of organic cation and inorganic lattice in methylammonium lead halide perovskites: Insights into a pressure-induced isostructural phase transition

• DOI: 10.1103/physrevmaterials.4.105403
• 发表时间: 2020-10
• 期刊: Physical Review Materials
• 影响因子: 3.4
• 作者: Sorb Yesudhas;Randy Burns;B. Lavina;S. Tkachev;Jiuyu Sun;C. Ullrich;S. Guha