二维TMDs激子光电特性的主动调控研究进展  

Research Progress on the Active Regulation of Photoelectric Properties of Two⁃Dimensional TMDs Excitons(Invited)

作　　者：钱文启 刘海毅 高腾腾 王雪盈 刘芳汛 林思涵 齐鹏飞[1,2] Qian Wenqi;Liu Haiyi;Gao Tengteng;Wang Xueying;Liu Fangxun;Lin Sihan;Qi Pengfei(Institute of Modern Optics,Nankai University,Tianjin 300350,China;Tianjin Key Laboratory of Microscale Optical Information Science and Technology,Tianjin 300350,China)

机构地区：[1]南开大学现代光学研究所,天津300350 [2]天津市微尺度光学信息技术科学重点实验室,天津300350

出　　处：《中国激光》2024年第18期4-20,共17页Chinese Journal of Lasers

基　　金：国家自然科学基金(12104241)。

摘　　要：二维过渡金属硫化物(TMDs)作为后摩尔时代战略性新材料,以其激子偶极矩强度大、线宽窄、无序性低和束缚能高等特性,在克服处理速度与集成度瓶颈的光电信息融合领域中展现出巨大潜力,因此室温低维激子物理与器件被广泛关注。深入探讨多种主动调控TMDs激子光致发光的方法,研究表明:通过声表面波(SAW)、粒子辐照、探针诱导及相变调控等技术优化激子动力学,可以显著提升器件光电性能。同时讨论二维激子主动调控在光电子学和光传感等领域中的应用,展望激子器件未来发展方向及挑战。Significance In the fields of modern information technology and optoelectronics,the exploration of new physical effects and their applications has become a key driving force for scientific and technological progress.As Moore’s law approaches its physical limits,it is particularly important to explore new materials and technologies that overcome the limitations of traditional semiconductor materials.Excitons,which are electrically neutral,hydrogenlike boson quasiparticles,are expected to combine the advantages of electrons and photons,thereby enhancing optoelectronic system interconnectivity.This makes them highly promising for nextgeneration optoelectronic devices.Twodimensional(2D)transition metal dichalcogenides(TMDs)semiconductors,owing to quantum confinement and reduced dielectric screening,exhibit excitons with nanometerscale Bohr radii and high binding energies(up to 500 meV).This facilitates device integration and roomtemperature manipulation of excitons.Additionally,broken inversion symmetry and spinorbit coupling in these materials introduce valleyspin degrees of freedom,offering new possibilities for information encoding and processing other than those based on charge and spin.Consequently,2D exciton devices,such as circuits,switches,transistors,and sensors,based on semiconductor quantum well excitons,have garnered significant interest over the past decade.Typically,exciton dynamics in 2D materials are passively regulated into a steady state using fixed substrate patterns to modulate the surface of monolayer TMDs,or steadystate strain fields to alter the band structure and photoluminescence(PL)properties of the material.In contrast,active control enables realtime,dynamically customizable exciton manipulation through external fields such as electric fields,mechanical strain,or optical manipulation,allowing precise adjustment and realtime feedback.Progress Surface acoustic wave(SAW)regulation is a method based on mechanical waves propagating along the surface of a solid to interact with 2D TMDs.By gener

关 键 词：二维材料 激子 过渡金属硫化物 主动调控 

分 类 号：O469[理学—凝聚态物理]