Achromatic metasurface optical components by dispersive phase compensation
Multi-wavelength light is directed to an optic including a substrate and achromatic metasurface optical components deposited on a surface of the substrate. The achromatic metasurface optical components comprise a pattern of dielectric resonators. The dielectric resonators have nonperiodic gap distances between adjacent dielectric resonators; and each dielectric resonator has a width, w, that is distinct from the width of other dielectric resonators. A plurality of wavelengths of interest selected from the wavelengths of the multi-wavelength light are deflected with the achromatic metasurface optical components at a shared angle or to or from a focal point at a shared focal length.
1. A method of altering incident light using metasurface optical components, the method comprising:
providing a substrate;
depositing metasurface optical components on the surface of the substrate, wherein the metasurface optical components comprise a pattern of silicon dielectric resonators, the silicon dielectric resonators having gap distances between adjacent silicon dielectric resonators, and each silicon dielectric resonator has a width and a thickness; and
directing incident light to the metasurface optical components, wherein the gap distances, the widths, and the thicknesses are configured to scatter the incident light and impart a phase shift, ranging at least from 0 to 2π, on an outgoing light.
2. The method of claim 1 , wherein the incident light comprises a wavelength of about 850 nm to 2000 nm.
3. The method of claim 2 , wherein the incident light comprises a wavelength of about 1100 nm to 1950 nm.
4. The method of claim 3 , wherein the incident light comprises a wavelength of about 1300 nm, 1550 nm, and/or 1800 nm.
5. The method of claim 4 , wherein the incident light comprises a narrow band light including a full width half max of about 30 nm.
6. The method of claim 1 , wherein the silicon dielectric resonators comprise amorphous silicon.
7. The method of claim 1 , wherein each of the dielectric resonators have a width of at least 100 nm.
8. The method of claim 1 , wherein the substrate comprises silica.
9. The method of claim 1 , wherein each dielectric resonator has a rectangular cross-section in a plane perpendicular to the substrate surface.
10. The method of claim 1 , wherein the wherein the gap between the dielectric resonators comprises a material with a refractive index lower than the refractive index of the dielectric pillars.
11. A metasurface optical device, comprising:
a substrate including a surface; and
a pattern of silicon dielectric resonators on the surface of the substrate, wherein the silicon dielectric resonators have gap distances between adjacent silicon dielectric resonators, and each silicon dielectric resonator has a width and a thickness and wherein the gap distances, the widths, and the thicknesses are configured to scatter incident light and impart a phase shift, ranging at least from 0 to 2π, on an outgoing light.
12. The metasurface optical device of claim 11 , wherein the incident light comprises a wavelength of about 850 nm to 2000 nm.
13. The metasurface optical device of claim 12 , wherein the incident light comprises a wavelength of about 1100 nm to 1950 nm.
14. The metasurface optical device of claim 13 , wherein the incident light comprises a wavelength of about 1300 nm, 1550 nm, or 1800 nm.
15. The metasurface optical device of claim 14 , wherein the incident light comprises a narrow band of light including a full width half max of about 30 nm.
16. The metasurface optical device of claim 11 , wherein the silicon dielectric resonators comprise amorphous silicon.
17. The metasurface optical device of claim 11 , wherein each of the dielectric resonators have a width of at least 100 nm.
18. The metasurface optical device of claim 11 , wherein the substrate comprises silica.
19. The metasurface optical device of claim 11 , wherein each dielectric resonator has a rectangular cross-section in a plane perpendicular to the substrate surface.
20. The metasurface optical device of claim 11 , wherein the gap between the dielectric resonators comprises a material with a refractive index lower than the refractive index of the dielectric pillars.