Figure | Principles of group extension and independent control of multiple harmonics with spatiotemporal metasurfaces. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure | Principles of group extension and independent control of multiple harmonics with spatiotemporal metasurfaces.

Caption

a, The conceptual illustration of manipulating the transmission of electromagnetic waves via spatiotemporal metasurface. b, The input phase states of the meta-atom with N=4. c, Cayley diagram of the product group Z_N×Z_q (Z_4×Z_3) that generates N×q (4×3) output phase states. d, The generated output spectral states of each meta-atom e, The schematic of independent control of spectral responses of the meta-atom at two harmonics, in which each line connects the spectral responses of the meta-atom generated by the same temporal sequence.

Credit

by Haotian Wu, Xin Xin Gao, Lei Zhang, Guo Dong Bai, Qiang Cheng, Lianlin Li, and Tie Jun Cui

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