首页|Strong nonlinear optical processes with extraordinary polarization anisotropy in inversion-symmetry broken two-dimensional PdPSe

Strong nonlinear optical processes with extraordinary polarization anisotropy in inversion-symmetry broken two-dimensional PdPSe

扫码查看
原文链接
  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
Nonlinear optical activities,especially second harmonic generation(SHG),are key phenomena in inversion-symmetry-broken two-dimensional(2D)transition metal dichalcogenides(TMDCs).On the other hand,anisotropic nonlinear optical processes are important for unique applications in nano-nonlinear photonic devices with polarization functions,having become one of focused research topics in the field of nonlinear photonics.However,the strong nonlinearity and strong optical anisotropy do not exist simultaneously in common 2D materials.Here,we demonstrate strong second-order and third-order susceptibilities of 64pmN and 6.2×10-19 m2/V2,respectively,in the even-layer PdPSe,which has not been discovered in other common TMDCs(e.g.,MoS2).Strikingly,it also simultaneously exhibited strong SHG anisotropy with an anisotropic ratio of～45,which is the largest reported among all 2D materials to date,to the best of our knowledge.In addition,the SHG anisotropy ratio can be harnessed from 0.12 to 45(375 times)by varying the excitation wavelength due to the dispersion of x(2)values.As an illustrative example,we further demonstrate polarized SHG imaging for potential applications in crystal orientation identification and polarization-dependent spatial encoding.These findings in 2D PdPSe are promising for nonlinear nanophotonic and optoelectronic applications.

Song Zhu、Ruihuan Duan、Xiaodong Xu、Fangyuan Sun、Wenduo Chen、Fakun Wang、Siyuan Li、Ming Ye、Xin Zhou、Jinluo Cheng、Yao Wu、Houkun Liang、Junichiro Kono、Xingji Li、Zheng Liu、Qi Jie Wang

展开 >

School of Electrical and Electronic Engineering,Nanyang Technological University,639798 Singapore,Singapore

School of Material Science and Engineering,Nanyang Technological University,639798 Singapore,Singapore

CINTRA CNRS/NTU/THALES,UMI 3288,Research Techno Plaza,Nanyang Technological University,637371 Singapore,Singapore

School of Materials Science and Engineering,Harbin Institute of Technology,150001 Harbin,China

Department of Chemistry,National University of Singapore,117543 Singapore,Singapore

GPL Photonics Lab,State Key Laboratory of Applied Optics,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,130033 Changchun,China

School of Electronics and Information Engineering,Sichuan University,610064 Chengdu,Sichuan,China

School of Physical and Mathematical Sciences,Nanyang Technological University,637371 Singapore,Singapore

Departments of Electrical and Computer Engineering,Physics and Astronomy,and Materials Science and NanoEngineering,Rice University,Houston,TX,USA

展开 >

Singapore Ministry of EducationAgency for Science,Technology and Research(A*STAR)Agency for Science,Technology and Research(A*STAR)Agency for Science,Technology and Research(A*STAR)National Medical Research Council(NMRC)National Research Foundation SingaporeNational Research Foundation SingaporeNational Research Foundation,Singapore under its Al Singapore ProgrammeNational Research Foundation

MOE-T2EP50120-0009M22K2c0080R23IOIR041A2090b0144Award number MOH-000927NRF-CRP22-2019-0007NRF-CRP23-2019-0007AISG2-GC-2023-009NRF2020-NRF-ISF004-3520

2024

10.1038/s41377-024-01474-6

光:科学与应用(英文版)
中国科学院长春光学精密机械与物理研究所

光:科学与应用(英文版)

CSTPCD
ISSN：2095-5545
年,卷(期)：2024.13(8)