Over the past 5 years,digital coding and programmable metamaterials have beendeveloped rapidly since their first exhibition in 2014.The iconic feature of the digitalcoding metamaterial is using digital codes like"...Over the past 5 years,digital coding and programmable metamaterials have beendeveloped rapidly since their first exhibition in 2014.The iconic feature of the digitalcoding metamaterial is using digital codes like"0"and"1 to represent the distinctelectromagnetic(EM)responses.This seemingly trivial progress has successfullyreform the design theory from the effective medium to coding patterns,bridgingthe physical world and digital information world.More interestingly,beyond thesimple coding on the parameters or patterns,the digital coding metamaterials aremore intend to introduce the concept of direct interactions and operations of digitalinformation within EM fields,to realize infomation processing,transmission orrecognition.Toaccurately exhibit the informational specialties,we classify the codingmetamaterials,digital metamaterials and programmable metamaterials,as well asother information-operating metamaterials,as information metamaterials In thisreview article,we fistly introduce the digital coding concept,working mechanism,and related design methods.Then,three important theories including the scatteringpattem calculation,convolution operationand entropyofdigital codingmetamaterials,arediscussed in details.Finally we introduce several system-level works based on theinfomation metamaterials,such as the new-architecture wireless communication systemsand reprogrammable imaging systems,to show the powerful manipulation capabilities ofinformation metamaterials.As the nextgeneration of infomation metamaterials,two proofof-concept smart metamaterials and their advanced architectures are discussed.In thesummary,the development track of information metamaterials and future trends are presented.展开更多
基金Key Research and Development Program of China(2017YA0700201,2017YFA0700202,and 2017YFA0700201)National Natural Science Foundation of China(61631007,61571117,61501112,61501117,61522106,617310061735010,61722106,61701107,and 61701108)111 Project(111-2-05)Fund for International Cooperation and Exchange of National Natural Science Foundation of China(61761136007)。
文摘Over the past 5 years,digital coding and programmable metamaterials have beendeveloped rapidly since their first exhibition in 2014.The iconic feature of the digitalcoding metamaterial is using digital codes like"0"and"1 to represent the distinctelectromagnetic(EM)responses.This seemingly trivial progress has successfullyreform the design theory from the effective medium to coding patterns,bridgingthe physical world and digital information world.More interestingly,beyond thesimple coding on the parameters or patterns,the digital coding metamaterials aremore intend to introduce the concept of direct interactions and operations of digitalinformation within EM fields,to realize infomation processing,transmission orrecognition.Toaccurately exhibit the informational specialties,we classify the codingmetamaterials,digital metamaterials and programmable metamaterials,as well asother information-operating metamaterials,as information metamaterials In thisreview article,we fistly introduce the digital coding concept,working mechanism,and related design methods.Then,three important theories including the scatteringpattem calculation,convolution operationand entropyofdigital codingmetamaterials,arediscussed in details.Finally we introduce several system-level works based on theinfomation metamaterials,such as the new-architecture wireless communication systemsand reprogrammable imaging systems,to show the powerful manipulation capabilities ofinformation metamaterials.As the nextgeneration of infomation metamaterials,two proofof-concept smart metamaterials and their advanced architectures are discussed.In thesummary,the development track of information metamaterials and future trends are presented.
