Multidimensional engineered metasurface for ultrafast terahertz switching at frequency-agile channels.

ABSTRACT: The ability to actively manipulate free-space optical signals by using tunable metasurfaces is extremely appealing for many device applications. However, integrating photoactive semiconductors into terahertz metamaterials still suffers from a limited functionality. The ultrafast switching in picosecond timescale can only be operated at a single frequency channel. In the hybrid metasurface proposed here, we experimentally demonstrate a dual-optically tunable metaphotonic device for ultrafast terahertz switching at frequency-agile channels. Picosecond ultrafast photoswitching with a 100% modulation depth is realized at a controllable operational frequency of either 0.55 THz or 0.86 THz. The broadband frequency agility and ultrafast amplitude modulation are independently controlled by continu

SUBMITTER: Hu Y 

PROVIDER: S-EPMC11501612 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature