摘要
Graphene has been recognized as a promising candidate in developing tunable terahertz(THz)functional devices due to its excellent optical and electronic properties,such as high carrier mobility and tunable conductivity.Here,we review graphene-based THz modulators we have recently developed.First,the optical properties of graphene are discussed.Then,graphene THz modulators realized by different methods,such as gate voltage,optical pump,and nonlinear response of graphene are presented.Finally,challenges and prospective of graphene THz modulators are also discussed.
基金
Project supported by the National Key Research and Development Program of China(Grant No.2017YFA0701004)
the National Natural Science Founda-tion of China(Grant Nos.61675145,61722509,61735012,and 61420106006).
