MRI: Development of Joint-use Ultra-fast Pump-probe Instrument for Thin-films Experimental Research

MRI：用于薄膜实验研究的联合使用超快泵浦探针仪器的开发

• 批准号: 1920368
• 负责人: Pallavi Dhagat
• 金额: $ 96.93万
• 依托单位: Oregon State University
• 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: 2019-09-15 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1920368&HistoricalAwards=false
• 关键词: MRI; Development; Joint; use; Ultra

Non-Technical Description:This instrument development project delivers a versatile, shared-use experimental platform to enable ultrafast, pulsed laser measurements to systematically determine the properties and investigate fundamental physical processes in a variety of new optical, magnetic and electronic materials of interest for application in solar cells, information storage, low-power computing and signal processing. The platform is available for use to researchers nationwide, via the National Nanotechnology Coordinated Infrastructure initiative. It, vitally, also serves in the education and training of the next-generation of scientists and engineers in advanced instrument design and ultrafast laser measurement techniques for materials.Technical Description:The instrument combines robust commercial components with custom-built subsystems to provide the experimental flexibility necessary to support diverse measurement needs. The laser pulses are tunable over a wide spectral range (258 nm to 2500 nm) and temporal characteristics (25 fs to 10 ps) with a repetition rate from 1 kHz to 1 MHz. The instrument integrates a magneto-optic cryostat to vary the temperature (1.7 K to 350 K) and magnetic field (up to 7 T) environment of the sample and allow steady-state to radio-frequency (15 GHz) electrical excitation and detection. Custom-designed optical subsystems enable laser pulse stretching and compression, programmable spatial modulation of the pulses, and scanning confocal microscopy. Control software, with remote front panels, allows virtual use. Examples of studies supported by the instrument include vibrational coupling and charge-carrier dynamics in perovskite thin films, determination of anisotropic elastic properties for engineered functional materials, magnon-phonon coupling in novel magnetostrictive materials, and intrinsic internal quantum efficiency and ultrafast electron dynamics of materials used in solar absorber devices.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.

非技术描述：该仪器开发项目提供了一个多功能的共享实验平台，使超快脉冲激光测量能够系统地确定各种新的光学，磁性和电子材料的特性并研究其基本物理过程，这些材料可用于太阳能电池，信息存储，低功耗计算和信号处理。该平台通过国家纳米技术协调基础设施倡议，可供全国研究人员使用。此外，该仪器还可为下一代科学家和工程师提供先进仪器设计和材料超快激光测量技术方面的教育和培训。技术描述：该仪器将强大的商用组件与定制的子系统相结合，提供必要的实验灵活性，以支持各种测量需求。激光脉冲可在宽光谱范围（258 nm至2500 nm）和时间特性（25 fs至10 ps）内调谐，重复率为1 kHz至1 MHz。该仪器集成了磁光低温恒温器，可改变样品的温度（1.7 K至350 K）和磁场（高达7 T）环境，并允许稳态至射频（15 GHz）电激发和检测。定制设计的光学子系统可实现激光脉冲拉伸和压缩、脉冲的可编程空间调制以及扫描共焦显微镜。带有远程前面板的控制软件允许虚拟使用。该仪器支持的研究实例包括钙钛矿薄膜中的振动耦合和电荷载流子动力学，工程功能材料的各向异性弹性特性的测定，新型磁致伸缩材料中的磁振子-声子耦合，以及太阳能吸收器设备中使用的材料的固有内部量子效率和超快电子动力学。该奖项反映了NSF的法定使命，并被认为值得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。

项目成果

Optomagneto control of singlet fission charge multiplication dynamics in single organic semiconductor crystals

单个有机半导体晶体中单线态裂变电荷倍增动力学的光磁控制

• DOI: 10.1364/cleo_fs.2023.ff2g.4
• 发表时间: 2023
• 期刊: Optica Publishing Group
• 作者: Mayonado, Gina;Zhu, Fangyi;Goldthwaite, Winston;Zhu, Liangdong;Anthony, John E.;Ostroverkhova, Oksana;Graham, Matt W.
• 通讯作者: Graham, Matt W.

Illuminating Trap Density Trends in Amorphous Oxide Semiconductors with Ultrabroadband Photoconduction

• DOI: 10.1002/adfm.202300742
• 发表时间: 2023-01
• 期刊: Advanced Functional Materials
• 影响因子: 19
• 作者: G. Mattson;Kyle T. Vogt;J. Wager;M. Graham

Ultrafast Photocurrent and Absorption Microscopy of Few-Layer Transition Metal Dichalcogenide Devices That Isolate Rate-Limiting Dynamics Driving Fast and Efficient Photoresponse

• DOI: 10.1021/acs.jpcc.0c02646
• 发表时间: 2020-03
• 期刊: The Journal of Physical Chemistry C
• 作者: Kyle T. Vogt;Sufei Shi;Feng Wang;M. Graham

Shedding light on ultrafast ring-twisting pathways of halogenated GFP chromophores from the excited to ground state

• DOI: 10.1039/d1cp02140k
• 发表时间: 2021-06-28
• 期刊: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
• 影响因子: 3.3
• 作者: Boulanger, Sean A.;Chen, Cheng;Fang, Chong
• 通讯作者: Fang, Chong

Photophysics and photochemistry of functionalized anthradithiophene in microcavities

微腔中功能化蒽并噻吩的光物理和光化学

• DOI: 10.1117/12.2632388
• 发表时间: 2022
• 期刊: SPIE
• 作者: Goldthwaite, Winston;Lamug, Roshell;Van Schenck, Jonathan;Puro, Richard;Anthony, John E.;Ostroverkhova, Oksana
• 通讯作者: Ostroverkhova, Oksana