This year is the 50th anniversary of the birth of the laser. The invention and development of the laser,which has many and varied physical and performance characteristics,has had a profound effect on modern electro-op...This year is the 50th anniversary of the birth of the laser. The invention and development of the laser,which has many and varied physical and performance characteristics,has had a profound effect on modern electro-optical technology. Looking in detail at the early pioneers who contributed to the advancement of the laser over the past 50 years,we can see how lasers have evolved and their tremendous influence on a wide range of disciplines and applications. We are indebted to the Society of Photo-Optical Instrumentation Engineers (SPIE) for their documentation of the evolution in innumerable conferences,handbooks and scientific papers.展开更多
Twist-angle two-dimensional systems,such as twisted bilayer graphene,twisted bilayer transition metal dichalcogenides,twisted bilayer phosphorene and their multilayer van der Waals heterostructures,exhibit novel and t...Twist-angle two-dimensional systems,such as twisted bilayer graphene,twisted bilayer transition metal dichalcogenides,twisted bilayer phosphorene and their multilayer van der Waals heterostructures,exhibit novel and tunable properties due to the formation of Moirésuperlattice and modulated Moirébands.The review presents a brief venation on the development of"twistronics"and subsequent applications based on band engineering by twisting.Theoretical predictions followed by experimental realization of magic-angle bilayer graphene ignited the flame of investigation on the new freedom degree,twistangle,to adjust(opto)electrical behaviors.Then,the merging of Dirac cones and the presence of flat bands gave rise to enhanced light-matter interaction and gate-dependent electrical phases,respectively,leading to applications in photodetectors and superconductor electronic devices.At the same time,the increasing amount of theoretical simulation on extended twisted 2D materials like TMDs and BPs called for further experimental verification.Finally,recently discovered properties in twisted bilayer h-BN evidenced h-BN could be an ideal candidate for dielectric and ferroelectric devices.Hence,both the predictions and confirmed properties imply twist-angle two-dimensional superlattice is a group of promising candidates for next-generation(opto)electronics.展开更多
文摘This year is the 50th anniversary of the birth of the laser. The invention and development of the laser,which has many and varied physical and performance characteristics,has had a profound effect on modern electro-optical technology. Looking in detail at the early pioneers who contributed to the advancement of the laser over the past 50 years,we can see how lasers have evolved and their tremendous influence on a wide range of disciplines and applications. We are indebted to the Society of Photo-Optical Instrumentation Engineers (SPIE) for their documentation of the evolution in innumerable conferences,handbooks and scientific papers.
基金financially supported by the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDB43000000)the CAS-JSPS Cooperative Research Project(No.GJHZ2021131)。
文摘Twist-angle two-dimensional systems,such as twisted bilayer graphene,twisted bilayer transition metal dichalcogenides,twisted bilayer phosphorene and their multilayer van der Waals heterostructures,exhibit novel and tunable properties due to the formation of Moirésuperlattice and modulated Moirébands.The review presents a brief venation on the development of"twistronics"and subsequent applications based on band engineering by twisting.Theoretical predictions followed by experimental realization of magic-angle bilayer graphene ignited the flame of investigation on the new freedom degree,twistangle,to adjust(opto)electrical behaviors.Then,the merging of Dirac cones and the presence of flat bands gave rise to enhanced light-matter interaction and gate-dependent electrical phases,respectively,leading to applications in photodetectors and superconductor electronic devices.At the same time,the increasing amount of theoretical simulation on extended twisted 2D materials like TMDs and BPs called for further experimental verification.Finally,recently discovered properties in twisted bilayer h-BN evidenced h-BN could be an ideal candidate for dielectric and ferroelectric devices.Hence,both the predictions and confirmed properties imply twist-angle two-dimensional superlattice is a group of promising candidates for next-generation(opto)electronics.
