With the increase of communication frequency,terahertz(THz)communication technology has been an important research feld;particularly the terahertz modulator is becoming one of the core devices in THz communication sys...With the increase of communication frequency,terahertz(THz)communication technology has been an important research feld;particularly the terahertz modulator is becoming one of the core devices in THz communication system.Te modulation performance of a THz communication system depends on the characterization of THz modulator.THz modulators based on diferent principles and materials have been studied and developed.However,they are still on the way to practical application due to low modulation speed,narrow bandwidth,and insufcient modulation depth.Terefore,we review the research progress of THz modulator in recent years and evaluate devices critically and comprehensively.We focus on the working principles such as electric,optical,optoelectrical,thermal,magnetic,programmable metamaterials and nonlinear modulation methods for THz wave with semiconductors,metamaterials,and 2D materials(such as graphene,molybdenum disulfde,and tungsten disulfde).Furthermore,we propose a guiding rule to select appropriate materials and modulation methods for specifc applications in THz communication.展开更多
基金The work was fnancially supported by Te National Key R.&D.Plan of China(2016YFB0402700,2017YFB0405400)The National Natural Science Foundation of China(61774175,61674146,and 61875140)+4 种基金The National Natural Science Foundation of China(Key Program:61634006)The Opened Fund of the State Key Laboratory of Integrated Optoelectronics(No.IOSKL2017KF12)the Key Program of Natural Science Foundation of Beijing(4181001)The Leading Project of Youth Academic Team@Minzu University of China(Sensor and Microsystem:317201929)Young and Middle-Aged Talents Training Program of State Ethnic Afairs Commission.
文摘With the increase of communication frequency,terahertz(THz)communication technology has been an important research feld;particularly the terahertz modulator is becoming one of the core devices in THz communication system.Te modulation performance of a THz communication system depends on the characterization of THz modulator.THz modulators based on diferent principles and materials have been studied and developed.However,they are still on the way to practical application due to low modulation speed,narrow bandwidth,and insufcient modulation depth.Terefore,we review the research progress of THz modulator in recent years and evaluate devices critically and comprehensively.We focus on the working principles such as electric,optical,optoelectrical,thermal,magnetic,programmable metamaterials and nonlinear modulation methods for THz wave with semiconductors,metamaterials,and 2D materials(such as graphene,molybdenum disulfde,and tungsten disulfde).Furthermore,we propose a guiding rule to select appropriate materials and modulation methods for specifc applications in THz communication.
