Efficient and nonlinear light polarization modulator based on metasurface and two-dimensional material and preparation method thereof

摘要: The invention discloses an efficient and nonlinear light polarization modulator based on a metasurface two-dimensional material preparation method thereof. comprises metal nanopore array located in lower layer the single-layer upper layer. A focused ion beam etching is utilized to process complete nano film so as obtain triangular array. transferred surface of by adopting hydrofluoric acid corrosion compounded metasurface. By utilizing metasurface, second harmonic direction for emergence can be modulated. Circularly polarized base-frequency incident produce oppositely circularly frequency-multiplied emergent light, linearly with polarizing angle theta 2theta. In addition, compared traditional conversion efficiency improved about two magnitude orders. small size, simple structure high integration level.