Linear and nonlinear record high optical birefringence in anisotropic van der Waals crystals  

作　　者：Luca Sortino 

机构地区：[1]Chair in Hybrid Nanosystems,Faculty of Physics,Ludwig-Maximilians-Universität München,80539,Munich,Germany

出　　处：《Light(Science & Applications)》2025年第1期5-7,共3页光(科学与应用)(英文版)

基　　金：Open Access funding enabled and organized by Projekt DEAL.

摘　　要：Multilayered van der Waals(vdW)materials are semiconductors composed of atomically thin crystal layers,held together by weak vdW forces.They offer unique crystal structures and electronic properties,distinct from conventional semiconductors,making them a promising platform for linear and nonlinear optics.In this context,the large refractive indexes given by highly polarizable transition metals,combined with excitonic resonances and unconventional crystalline structures,provides a toolbox for exploring non-linear physics and strong light-matter interactions with unprecedented opportunities for nanoscale optics.Recent reports highlight novel vdW materials,particularly PdPSe,a pentagonal crystal with strong nonlinear responses,and As2S3,a record high birefringence crystal,as favorable candidates to engineer nonlinear responses and miniaturization of optical components,owing to the combination of high refractive index and strong optical anisotropy of the underlying crystal structures.While still in its infancy,research on vdW materials promise a florid ground for fundamental studies,bridging the gap between material science and nanoscale optics.

关 键 词：nonlinear OPTICS CRYSTAL 

分 类 号：O43[机械工程—光学工程]