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The authors demonstrate a single-shot ultrafast terahertz (THz) photography system that can provide both the 2D spatial and 1D temporal imaging capabilities of ultrashort transient scenes with sub-picosecond temporal resolutions by engineering the electro-optic detection system.

Waveguides that can provide complex signal-processing functionalities while guiding terahertz signals are desired. Here, the authors report the independent processing of multiplexed signals by engineering the metal surface of a four-wire waveguide.

Homojunctions are very promising in photocatalysis, but challenging to achieve. Herein, authors report a well-defined hierarchical metal–organic framework-based homojunction, formed via a one-pot synthesis route directed by hollow transition metal nanoparticles, as photocatalysts for CO2 reduction.