Nano-Optics is a valuably novel class of technology that takes advantage of light’s unique interaction with subwavelength, nano-scale patterned materials, and nanotechnology-enabled fabrication techniques to make a broadly appropriate optical device and manufacturing platform. Nano-optics also can be created with nanostructures in one, two, or three dimensions. Based on the configuration of the nanostructures and the constituent materials used in their construction, these devices can work as:
• polarization beam splitters and combiners
• wave plates
• antireflective and diffusive coatings and more.
Metasurfaces are a topic of important research and are used in numerous applications due to their distinctive ability to manipulate electromagnetic waves in the microwave and optical frequencies. These artificial sheet materials are mostly composed of metallic patches or dielectric etchings in planar or multi-layer configurations with subwavelength thickness, have the advantages of a lightweight, ease of fabrication, and capable to regulate wave propagation both on the surface and within the surrounding free space.
Applications of Metasurfaces:
The interaction of surface plasmon with the electromagnetic wave leads to a phase discontinuity across the metasurface. Since elements on a metasurface can be spatially varied, this variation can cause the currents on the surface to lead depending on the individual resonant element. This localized phenomenon allows us to tailor the wavefronts as they go through a metasurface and results in a variety of applications.