Actively reconfigurable, hyperbolic metasurfaces
Metallic and dielectric domains in phase change materials (PCM) provide spatially localized changes in the local dielectric environment, enabling launching, reflection, and transmission of hyperbolic polaritons (HPs) at the PCM domain boundaries, and tuning the wavelength of HPs propagating in hyperbolic materials over these domains, providing a methodology for realizing planar, sub-diffractive refractive optics. This approach offers reconfigurable control of in-plane HP propagation to provide design optical functionality because the phase change material can be manipulated by changing the local structure, for example, to manipulate polaritons in the adjacent hyperbolic material, thus tuning the wave propagation properties of the polaritons in the hyperbolic material.
1. An optical component, comprising:
a phase change material having an optical property having a first value associated with a first material phase and a second value associated with a second material phase; and
a hyperbolic polaritonic material on the phase change material, the hyperbolic polaritonic material having a first optical response in a first direction and a second optical response in a second direction and a third optical response in the third direction.
2. The optical component of claim 1 , wherein the first optical response is metallic in-plane and the second optical response is dielectric out-of-plane and the third optical response is either metallic or dielectric.
3. The optical component of claim 1 , wherein the phase change material is patterned and the hyperbolic polaritonic material is located over the pattern.
4. The optical component of claim 3 , wherein the pattern comprises a first pattern and a second pattern, the first pattern corresponding to the first optical response and the second pattern corresponding to second optical response.
5. The optical component of claim 4 , wherein the first optical response is metallic in-plane and the second optical response is dielectric out-of-plane and the third optical response is either metallic or dielectric.
6. The optical component of claim 1 , wherein the optical property is local optical contrast.
7. The optical component of claim 1 , wherein the optical property is index of refraction.
8. The optical component of claim 1 , wherein the optical property is absorption.
9. The optical component of claim 1 , wherein the phase change material is latchable.
10. The optical component of claim 9 , wherein the phase change material is germanium antimony telluride.
11. The optical component of claim 1 , wherein the phase change material is non-latchable.
12. The optical component of claim 11 , wherein the phase change material is vanadium dioxide.
13. The optical component of claim 1 , wherein the hyperbolic material comprises hexagonal boron nitride.
14. The optical component of claim 1 , wherein the hyperbolic material comprises a natural hyperbolic material.
15. The optical component of claim 1 , wherein the hyperbolic material comprises a hyperbolic metamaterial.
16. The topical component of claim 1 , wherein the hyperbolic material comprises a hyperbolic metasurface.