Digital Coding Technology for Harmonic Control of Meta-Atoms

With the progress of meta--atoms, digital coding technology has become an important branch of this research field with its advantage in establishing the connection between digital information and meta-atoms, which greatly simplifies the metaatom design. In this paper, a digital coding technique for harmonic generation and regulation is introduced. Firstly, the harmonic number is modified by changing the phase slope, and then the corresponding harmonic amplitude and phase are regulated by designing the coding control. The introduced digital coding technique gets rid of the problem of harmonic crosstalk existing in the traditional multi-frequency control technology, and at the same time make the beam control more flexible, which greatly improves the efficiency of communication.