Abstract:Metasurface-based spatial phaser, exhibiting dispersive group delay responses, is able to perform real-time analogue signal processing on the temporal spectrum of spatial electromagnetic waves, e.g., Fourier transformation, pulse chirping, pulse spread, and compression. The functionality of a spatial phaser is closely related to its group delay dispersion slope. For instance, for an up-chirped incident pulse, the positive-slope-dispersion phaser spreads the pulse whereas the negative-slope-dispersion one compr… Show more
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