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The cover illustrates an optically addressed nested Fourier metasurface, where a beam illuminating each mode region excites its corresponding diffraction and polarization states, while a global superlattice orchestrates multidimensional routing. The work enables programmable optical routing without interconnects. More details can be found in the Research Article by Qiang Liu, Qi Song, and co-workers (DOI: 10.1002/nap2.70309).
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