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.

这项重大的研究仪器奖支持在物理，材料科学和工程，化学，化学工程，生物学和生物工程中在凝结物质系统的交叉点上进行超快速放大激光系统的获取。用超快的短激光脉冲探测材料捕获了在极短的时间表上发生的一些最基本的物理过程。这些项目解决的过程提供了有关太阳能电池中的电荷转移和光激励的洞察，有机电子，量子材料和（Bio）有机材料中的非线性光学现象以及中孔材料中的瞬态光学过程。超快激光设施在增强了凝聚态物质系统的非线性光学和时间分辨光谱研究的同时，补充了密苏里大学（MU）的纳米医学，纳米技术和纳米科学的现有研究中心。该项目旨在使MU和密苏里州的大型用户群提供超快激光技术。该乐器和可用专业知识的跨学科广度的多功能性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，并为它们做好准备以就业，以便在纳米技术，生物技术，材料科学和工程学以及基于半导体的学术研究或行业或行业中就业。林肯大学的学生和研究人员的参与，密苏里州的一所历史悠久的黑人学院和该州的其他机构也加强了研究和教育活动，以及在高中指导和中学外展计划中持续的努力，欧洲舞台上的持续努力为材料和电子设备中的非线性光学过程提供了新的新领域。所提出的系统是一种多功能飞秒激光系统，具有宽带波长可调性和用于多维光谱的功能。它由三个部分组成：（a）飞秒振荡器（模式锁定的Ti-Sapphire Laser）； （b）飞秒的放大器； （c）非连续性光学参数放大器。该项目着重于研究电子材料和有机半导体晶体管中的载体动力学和光学非线性，以改善基于有机电子的技术。对二维（2D）材料的研究，尤其是单层过渡金属二分法源，将通过深入了解这些材料中的激子过程而受益。在分子有机晶体的区域中，第二次谐波生成测量，合成和计算模拟中的综合努力将通过合理设计建立大规模的极性顺序。超快激光系统将用于利用生物纳米结构的非线性光学性质，以便获得具有潜在应用纳米素化合物的多波长相干来源。该项目将通过探测瞬态光学过程并根据将其集成到光电设备所需的顺序上制造微型和纳米结构来进一步开发基于二氧化硅的材料。提出的实验激光设施将通过建立一个非线性光学的中心（包括实验者和理论家）来促进新兴的超快和非线性光学现象中的研究和教育活动，以促进凝结物质系统中的研究和教育活动，这是NSF的法定任务，并通过评估范围的范围来反映出众多的范围。

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