Time-resolved Chemical Imaging of Molecules by High-order Harmonics and Ultrashort Rescattering Electrons

Lin, Chii Dong¹ 

[1]Kansas State Univ., Manhattan, KS (United States)

关键词: TIME RESOLUTION;    FOURIER TRANSFORMATION;    RESCATTERING;    SPATIAL RESOLUTION;    ELECTRONS;    ENERGY SPECTRA;    HARMONICS;    VISIBLE RADIATION;    TOMOGRAPHY;    MOLECULAR ST;   

DOI  :  10.2172/1242403
RP-ID  :  DOE-KSU--15832-1
PID  :  OSTI ID: 1242403
Others  :  TRN: US1600913

美国|英语

来源: SciTech Connect

【 摘 要 】

Directly monitoring atomic motion during a molecular transformation with atomic-scale spatio-temporal resolution is a frontier of ultrafast optical science and physical chemistry. Here we provide the foundation for a new imaging method, fixed-angle broadband laser-induced electron scattering, based on structural retrieval by direct one-dimensional Fourier transform of a photoelectron energy distribution observed along the polarization direction of an intense ultrafast light pulse. The approach exploits the scattering of a broadband wave packet created by strong-field tunnel ionization to self-interrogate the molecular structure with picometre spatial resolution and bond specificity. With its inherent femtosecond resolution, combining our technique with molecular alignment can, in principle, provide the basis for time-resolved tomography for multi-dimensional transient structural determination.