Author Affiliations
State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, Chinashow less
Fig. 1. Schematic diagrams of phase gradient control and phase matching. (a) Direction of light propagation is opposite to that of phase gradient
[36]; (b) direction of light propagation is the same as that of phase gradient
[36]; (c) coupling free light field into waveguide propagation mode by phase matching
[40] Fig. 2. Schematic diagrams of devices using surface plasmon and mode converter. (a)(b) Structure diagrams of metal antenna array on one dimensional dielectric silicon nitride waveguide
[47]; (c) schematic diagram of waveguide mode converter
[52] Fig. 3. Design of on-chip super surface lens using effective refractive index
[46]. (a) Effective refractive indexes of gold blocks with different lengths varying with wavelength; (b) change of effective refractive index with the length of gold block at selected wavelength; (c) curve of effective refractive index at each point
Fig. 4. Structure schematic of metasurface design using transfer matrix. (a)(b) Schematic diagram of waveguide mode converter
[52]; (c)(d) schematic diagram of antenna coupler for arbitrary polarization
[39] Fig. 5. Structural diagram of metasurface dispersionless lens
[56] Fig. 6. Schematic diagrams of metasurface beam splitter. (a) Schematic diagram of metasurface mode beam splitter
[48] ; (b) for TE and TM modes, schematic diagrams of the effective refractive index of the metasurface
[48] ; (c) electron micrograph of metasurface wavelength beam splitter
[57] ; (d) transmission change of different channels with different wavelengths
[57] Fig. 7. Structure diagrams of metasurface on-chip coupler. (a) Structure diagram and electron microscope photo of photonic crystal structure coupler
[41]; (b) schematic diagram of antenna structure coupler
[39] Fig. 8. Metasurface mode converter. (a) Schematic diagram of metasurface mode converter
[55]; (b) transmission curves of various waveguide modes
[55]; (c) electron micrograph of metasurface mode converter
[52]; (d) mode conversion efficiency curves of various waveguide modes
[52] Fig. 9. Metasurface dispersionless lens and convolver
[56]. (a) Electron micrograph of metasurface dispersionless lens; (b)(c) intensity distribution at focal plane of metasurface lens for 1000 nm and 1550 nm; (d)(e) theoretical calculation, numerical simulation and experimental results of metasurface convolver for 1000 nm and 1550 nm
Fig. 10. Asymmetric propagation waveguide
[36]. (a) Structure diagram of asymmetric propagation waveguide; (b) transmission distribution of incident TE fundamental mode from the left; (c) transmission distribution of incident TE fundamental mode from the right