How do metasurfaces work?
The principle of operation of metasurfaces is based on the phenomenon of diffraction. Any flat periodic array can be viewed as a diffraction lattice, which splits the incident light into a few rays.
Why is metasurface important?
One of the most important applications of metasurfaces is to control a wavefront of electromagnetic waves by imparting local, gradient phase shifts to the incoming waves, which leads to a generalization of the ancient laws of reflection and refraction.
What are plasmonic metasurfaces?
So-called plasmonic metasurfaces are 2D arrays of such optical nanoantennas, distributed on a substrate to provide properties beyond the mere average response of the materials they are made from.
What is the difference between metasurface and metamaterial?
is that metamaterial is (engineering|physics) any material that obtains its electromagnetic properties from its structure rather than from its chemical composition; especially a material engineered to have features of a size less than that of the wavelength of a class of electromagnetic radiation while metasurface is ( …
What are metasurfaces made from?
Abstract. Optical metasurfaces are ultra-thin planar optical components that are composed of arrays of subwavelength nanostructures modulating the amplitude, phase, and polarization of incident light.
What are optical metasurfaces?
Optical metasurfaces (OMs) are sub-wavelength patterned layers that interact strongly with light, thus dramatically altering the light properties over a subwavelength thickness. In contrast to conventional optics, which rely on light refraction and propagation (Fig.
What is are the examples of plasmonic materials?
Most common plasmonic materials are gold and silver. However, many other materials show metal-like optical properties in specific wavelength ranges.
What are metasurfaces made of?
Is graphene a metamaterial?
4. Graphene-based metamaterial absorber. With extraordinary electronic and optical properties, graphene has caused enormous research interest in recent years. The conductivity or carrier density of graphene can be tuned by the chemical potential via an external gate voltage.
Who coined the term metamaterials?
V.G. Veselago
In 1967, V.G. Veselago from Moscow Institute of Physics and Technology considered the theoretical model of medium that known now as a metamaterial. However, physical experimentation did not occur until 33 years after the paper’s publication due to lack of available materials and lack of sufficient computing power.
What are metamaterials made of?
Metamaterials are composite materials typically composed of arrays of small metallic resonators structured on the microscale or nanoscale (McPhedran, Shadrivov, Kuhlmey, & Kivshar, 2011; Walser, 2003).
What are metasurfaces?
Metasurfaces enable a spatially varying optical response (e.g. scattering amplitude, phase, and polarization), mold optical wavefronts into shapes that can be designed at will, and facilitate the integration of functional materials to accomplish active control and greatly enhanced nonlinear response.
Can metasurface be integrated into an optical fiber system?
In a word, there is still a long way to realize the integration of metasurface into an optical fiber system. As the latest generation of optical devices, the compactness of metasurface is unmatched by traditional optical devices.
Plasmonic metasurfaces have opened a whole new paradigm for controlling electromagnetic waves in unprecedented ways, intriguing various novel optical effects and applications not achievable using natural materials or traditional optical devices.
How to design metasurface coatings to achieve desired spectral properties?
In general, by designing the structural hierarchy, compositional heterogeneity, and local anisotropy of metasurface structures, one could create coatings that are optically thin and have desired spectral properties (reflectivity, absorptivity, transmissivity, and emissivity) over an extremely broad electromagnetic spectral range.