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Research Highlight

Multifunctional Metaoptics based on Bilayer Metasurfaces

Optical metasurfaces have become versatile platforms for manipulating the phase, amplitude, and polarization of light.
Top: Schematic of the bilayer hologram consisting of two independent Vanderbilt logos projected at two independent wavelengths. Bottom: Images produced under illumination wavelengths of 1180 nm (left) and 1680 nm (right)

Scientific Achievement

Multiwavelength holograms, multiwavelength waveplates, and polarization-insensitive 3D holograms based on phase and amplitude masks are demonstrated.

Significance and Impact

The proposed architecture - bilayer dielectric metasurfaces - opens a new avenue for designing complex flat optics with a wide variety of functionalities.

Research Details

– Independent control of the phase, amplitude, and polarization of light due to a bilayer design – Two or more optical properties are independently manipulated – Multiwavelength performance   Y. Zhou, I. I. Kravchenko, H. Wang, H. Zheng, G. Gu, and J. Valentine, "Multifunctonal metaoptics based on bilayer metasurfaces," Light: Science & Applications (2019).