Picosecond mode switching and Higgs amplitude mode in superconductor-metal hybrid terahertz metasurface.

ABSTRACT: The ultrafast modulation of terahertz (THz) waves is essential for numerous applications, such as high-rate wireless communication, nonreciprocal transmission, and linear frequency conversion. However, high-speed THz devices are rare due to the lack of materials that rapidly respond to external stimuli. Here, we demonstrate a dynamic THz metasurface by introducing an ultrathin superconducting microbridge into metallic resonators to form a superconductor-metal hybrid structure. Exploiting the susceptibility of superconducting films to external optical and THz pumps, we realized resonance mode switching within a few picoseconds. The maximum on/off ratio achieved is 11 dB. The observed periodic oscillation of transmission spectra both in the time and frequency domain under intense THz pump pu

SUBMITTER: Duan S 

PROVIDER: S-EPMC11501531 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature