Linear and phase controllable terahertz frequency conversion via ultrafast breaking the bond of a meta-molecule.

ABSTRACT: The metasurface platform with time-varying characteristics has emerged as a promising avenue for exploring exotic physics associated with Floquet materials and for designing photonic devices like linear frequency converters. However, the limited availability of materials with ultrafast responses hinders their applications in the terahertz range. Here we present a time-varying metasurface comprising an array of superconductor-metal hybrid meta-molecules. Each meta-molecule consists of two meta-atoms that are "bonded" together by double superconducting microbridges. Through experimental investigations, we demonstrate high-efficiency linear terahertz frequency conversion by rapidly breaking the bond using a coherent ultrashort terahertz pump pulse. The frequency and relative phase of the conv

SUBMITTER: Duan S 

PROVIDER: S-EPMC10847458 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature