Multifunctional metasurface lens for imaging and Fourier transform

Area of Science:

• Optics and Photonics
• Materials Science
• Nanotechnology

Background:

• Metasurfaces offer precise light manipulation through local phase changes.
• Conventional optical lenses are limited in functionality and size.
• Integrating multiple lens types into a single device is a key goal for miniaturization.

Purpose of the Study:

• To demonstrate an ultrathin metasurface lens with dual functionality (spherical/cylindrical).
• To achieve helicity-controllable optical performance in a single device.
• To explore applications in polarization imaging and optical processing.

Main Methods:

• Fabrication of an ultrathin metasurface lens using nanoantennas.
• Experimental characterization of the lens's optical performance under different light helicities.
• Demonstration of imaging and Fourier transform capabilities.

Main Results:

• The metasurface lens successfully functioned as both a spherical and a cylindrical lens.
• Helicity-dependent control of focal points and focal lines was achieved.
• The device demonstrated capabilities for imaging and 1D/2D Fourier transforms.

Conclusions:

• The developed metasurface lens integrates dual lens types and polarities in a single device.
• This technology offers a unique tool for polarization imaging, image processing, and particle trapping.
• The work advances the development of compact and versatile optical components.