Non‐Centrosymmetric 2D Nb3SeI7 with High In‐Plane Anisotropy and Optical Nonlinearity
Source abstract
Abstract
Abstract Integrating anisotropy and nonlinearity of physical properties in 2D materials is of great importance to the progress of nanoelectronic, nanophotonic, and nano‐optoelectronic applications. In this work, Nb3SeI7, a newly discovered ternary layered material with non‐centrosymmetric lattices, is introduced, which exhibits strong second harmonic generation (SHG), in‐plane anisotropic electricity, and light absorption. Symmetry breaking of 2D Nb3SeI7 induced by the polar off‐center displacement of niobium leads to a high nonlinear optical response with a second‐order susceptibility of 6.71 pm V−1 and a high anisotropic factor of photoresponsivity up to 4.6, which are higher than most of the 2D materials. These properties of 2D Nb3SeI7 create new possibilities for chip‐integrated nonlinear optics devices and future‐proof polarization‐sensitive optoelectronic systems.
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Research context
OpenAlex topics: 2D Materials and Applications · MXene and MAX Phase Materials · Inorganic Chemistry and Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China
State Key Laboratory of High‐Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China
Institute of Physical and Theoretical Chemistry Eberhard Karls University Tübingen 72076 Tübingen Germany
Institute of Modern Optics School of Physics Harbin Institute of Technology Harbin 150001 China
MOE Key Laboratory of Micro‐Systems and Micro‐Structures Manufacturing Harbin Institute of Technology Harbin 150080 China
Sauvage Laboratory for Smart Materials School of Materials Science and Engineering Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China
Funding
National Natural Science Foundation of China · Deutsche Forschungsgemeinschaft
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