In situ tracking anisotropic photocarrier dynamics in two-dimensional ternary Ta_(2)NiSe_(5) via digital micromirror device-based pump-probe microscopy

作     者：BINGXU CHEN JIE QIAO FEI HAN FU FENG SHIH-CHI CHEN BINGXU CHEN;JIE QIAO;FEI HAN;FU FENG;SHIH-CHI CHEN

作者机构：Department of Mechanical and Automation EngineeringThe Chinese University of Hong KongHong KongChina Zhejiang LabResearch Center for Humanoid SensingHangzhou 311100China 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2024年第12卷第9期

页      面：1918-1926页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0803[工学-光学工程] 

基　　金：Research Grants Council,University Grants Committee(14209421) InnoHK Centre projects funded by the Innovation and Technology Commission(COCHE1.5) Science,Technology and Innovation Commission of Shenzhen Municipality(SGDX2020110309500100) Center-initiated Research Project of Zhejiang Lab(113014-AL2209) Natural Science Foundation of Zhejiang Province(LQ23F050009) National Natural Science Foundation of China(61905147,62205215,62275167) 

主　　题：anisotropic mirror transient 

摘      要：In two-dimensional(2D)material studies,tracking the anisotropic ultrafast carrier dynamics is essential for the development of optoelectronic ***,the anisotropic optical and electronic properties are investigated via either polarization-dependent Raman spectroscopy or field-effect transistors ***,study of the anisotropic transient carrier behaviors is still challenging,due largely to the lack of picosecond-resolved acquisition or programmable scanning capabilities in the current characterization *** this work,we select Ta_(2)NiSe_(5) as a model system to investigate the ultrafast anisotropic transportation properties of photo-excited carriers and transient polarized responses via a digital micromirror device(DMD)-based pumpprobe microscope,where the probe beam scans along the armchair and zigzag directions of a crystal structure via binary holography to obtain distinct carrier diffusion coefficients,*** results reveal the nonlinear diffusion behaviors of Ta_(2)NiSe_(5) in tens of picoseconds,which are attributed to the interplay between excited electrons and *** trend of the measured local polarization-dependent transient reflectivity is consistent with the polarized Raman spectra *** results show that the DMD-based pump-probe microscope is an effective and versatile tool to study the optoelectronic properties of 2D materials.