17-GHz lossless InP-membrane active metasurface.

ABSTRACT: High-speed active metasurfaces enable spatiotemporal light control within an ultrathin device layer, offering previously unexplored possibilities for optical communication, sensing, and computing. However, a trade-off between electrical conductivity and optical loss has hindered the realization of a high-speed, low-loss device. Here, we experimentally demonstrate an active metasurface operating at 1.5-μm wavelength range that achieves a record-high 17.5-GHz modulation bandwidth while maintaining a high quality (Q) factor of 102 and an ultralow optical loss of 0.56 dB. This is enabled by the indium phosphide (InP) membrane platform, where n-InP offers high electron mobility and low free-carrier absorption simultaneously. A high-Q Friedrich-Wintgen quasi-bound-state-in-the-cont

SUBMITTER: Fukui T 

PROVIDER: S-EPMC12680059 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature