Ultra-broadband,fast,and polarization-sensitive photoresponse of low-symmetry 2D NdSb_(2)  

作　　者：Gang Li Hanlin Zhang Yong Li Shiqi Yin Xucai Kan Wensen Wei Haifeng Du Binghui Ge Chao An Mingliang Tian Feng Yan Sanjun Yang Tianyou Zhai Liang Li 

机构地区：[1]Institutes of Physical Science and Information Technology,Anhui University,Hefei 230601,China [2]Engineering Technology Research Center of Magnetic Materials,School of Physics and Materials Science,Anhui University,Hefei 230601,China [3]Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory of the Chinese Academy of Science,Hefei 230031,China [4]Department of Applied Physics,The Hong Kong Polytechnic University,Kowloon,Hong Kong 999077,China [5]State Key Laboratory of Materials Processing and Die and Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology(HUST),Wuhan 430074,China

出　　处：《Nano Research》2022年第6期5469-5475,共7页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51902001);the Recruitment Program for Leading Talent Team of Anhui Province(2019-16);the Natural Science Foundation of Anhui Province(No.1908085QE17);the Open Research Fund of Advanced Laser Technology Laboratory of Anhui Province(No.AHL2020KF02).

摘　　要：Broadband photodetectors with polarization-sensitive ability have received extraordinary attention for modern optoelectronic devices.Ideal photodetectors should possess high responsivity,fast response,and good stability,which are rare to meet at the same time in one low-symmetric two-dimentional(2D)material.In this work,neodymium diantimonides(RSb_(2)),a member of light rare-earth diantimonides RSb_(2)(R=La–Nd,Sm)with low-symmetry structure,is introduced as a fascinating highly anisotropic 2D material for broadband detection(532 nm to 4μm).The photodetector exhibits a responsivity of 0.49 mA·W^(−1)with 15μs response time at 532 nm and highly stable performance under ambient conditions over 8 months.Furthermore,we identify the polarization-sensitive photoresponse of the detector and demonstrate a high anisotropic factor~1.6.In addition,strong inplane anisotropy is revealed by anisotropic phonon response and the photodetection mechanism is investigated by scanning photocurrent microscopy measurements.This pioneer work on RSb_(2)paves the way for further exploration of 2D RSb_(2)for high performance polarized photodetectors with fast photothermoelectric response.

关 键 词：ULTRA-BROADBAND fast response polarization-sensitive photodetector RSb_(2) 

分 类 号：TN2[电子电信—物理电子学]