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A direct method to calculate second-order two-dimensional terahertz spectroscopy in frequency-domain based on classical theory

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Frontiers of Optoelectronics 2018年第4期11卷 413-418页

作者： Feidi XIANG Kejia WANG Zhengang YANG Jinsong LIU Shenglie WANG Wuhan National Laboratory for Optoelectronics School of Optical and Electronic informationHuazhong University of Science and Technology Wuhan 430074China

Previous theoretical researches on the two-dimensional terahertz spectroscopy (2DTS), which are conducted via inefficiently time-consuming numerical simulation, deal with only single-mode system. To overcome the limitations, we derive a classical-theory-based analytical solution which is applicable to multi-modes system. Three typical weak sources of nonlinearities are introduced. The findings suggest that the analytical results correspond well with those obtained by the traditional numerical simulation. Thus the study provides a more efficient and practical method to directly calculate 2DTS, and, in a broader sense, sheds new light on the theory of 2DTS.

关键词： two-dimensional spectroscopy terahertz classical method

Laser-induced fluorescence experimental spectroscopy and theoretical calculations of uranium monoxide

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Chinese Physics B 2022年第5期31卷 245-252页

作者： Xi-Lin Bai Xue-Dong Zhang Fu-Qiang Zhang Timothy C Steimle School of Physics and Information Engineering Key Laboratory of Spectral Measurement and Analysis of Shanxi ProvinceShanxi Normal UniversityLinfen 041004China School of Chemical and Material Science Key Laboratory of Magnetic Molecules&Magnetic Information Materials of Ministry of EducationShanxi Normal UniversityLinfen 041004China School of Molecular Science Arizona State UniversityTempe 85287USA

As a model molecule of actinide chemistry,UO molecule plays an important role in understanding the electronic structure and chemical bonding of actinide-containing *** report a study of the laser-induced fluorescence spectra of the U^(16)O and U^(18)O using two-dimensional *** rotationally resolved excitation spectra were *** molecular rotational constants and equilibrium internuclear distances were ***-lying electronic states information was extracted from high resolution dispersed fluorescence spectra and analyzed by the ligand field theory *** configuration of the ground state was determined as U^(2+)(5 f^(3)7 s)O^(2-).The branching ratios,and the vibrational harmonic and anharmonic parameters were also *** lifetimes were determined by recording the timeresolved fluorescence *** dipole moments were calculated using the branching ratios and the radiative *** findings were elucidated by using quantum-chemical calculations,and the chemical bonding was also *** findings presented in this work will enrich our understanding of actinide-containing molecules.

关键词： laser-induced fluorescence two-dimensional spectroscopy density functional theory

Laser-induced Fluorescence spectroscopy of Uranium Monofluoride

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Chinese Journal of Chemical Physics 2022年第5期35卷 754-763,I0011页

作者： Xi-lin Bai You-long Wang Timothy C.Steimle School of Physics and Information Engineering Key Laboratory of Spectral Measurement and Analysis of Shanxi ProvinceShanxi Normal UniversityLinfen 041004China .School of Molecular Science Arizona State UniversityTempe 85287USA

The laser-induced fluorescence excitation spectra of uranium monofluoride have been recorded in the range of17000-19000 cm^(-1) using twodimensional *** resolution dispersed fluorescence spectra and time-resolved fluorescence spectroscopy were also *** rotationally resolved bands were intensively analyzed,and all bands were found to be derived from the ground state X(1)4.5 with a rotational constant of 0.23421 cm^(-1).The low-lying electronic states were observed near 435 and 651 cm^(-1) in the dispersed fluorescence spectra,which were assigned as?′=3.5 and 2.5,*** vibrational constants for the X(1)4.5 and X(1)3.5 states were *** branching ratios of the dispersed fluorescence spectra for the[18.62]3.5,[17.72]4.5,and[17.65]4.5 states were *** lifetime of332(9)ns,825(49)ns,and 433(15)ns for the[18.62]3.5,[17.72]4.5,and[17.65]4.5 states were obtained by fitting the time-resolved fluorescence spectroscopy,*** dipole moments were performed using the branching ratios and the radiative lifetimes.

关键词： Laser-induced fluorescence Uranium monofluoride two-dimensional spectroscopy

Synthesis and Spectroscopic Study of a New Li-B-V-O Cluster Compound

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光谱学与光谱分析 2016年第S1期36卷 11-12页

作者： HUANG Meng-meng GUO Bing-cui HUANG Mei-qing LIN Hui-yun SHI Lin LIU Ting-yu CHEN Yi-ping College of Chemistry Fuzhou UniversityFuzhou 350108 China Fuzhou No.1 Middle School Fuzhou 350108 China

In this paper,the synthesis of a novel polyoxovanadiumborate[Li(H2O)3]3[V12B18O48(OH)12(OH)]·(H2O)5by hydrothermal ***,2DFTIR and UV-Vis absorption spectroscopy were employed to explore the relationships between stru... 详细信息

关键词： Polyoxovanadiumborate cluster Crystal-Structure two-dimensional spectroscopy Hydrothermal synthesis