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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Traditional infrared optical systems face limitations in size, field of view, thermal sensitivity, and cost.
  • Metasurfaces offer potential for miniaturization and enhanced optical functionalities.

Purpose of the Study:

  • To design silicon complementary metal-oxide-semiconductor (CMOS)-compatible metasurfaces for high-performance infrared optical systems.
  • To overcome the limitations of conventional optical technologies using a novel design approach.

Main Methods:

  • Leveraging catenary optics and an isophase streamline optimization approach.
  • Utilizing the local geometric phase for metasurface design.
  • Designing silicon-based metasurfaces compatible with CMOS fabrication.

Main Results:

  • Achieved broadband, wide-angle, and high-efficiency infrared optical system performance.
  • Demonstrated maximum diffraction efficiency approaching 100% across ultrawide spectral and angular ranges.
  • Realized wide-angle, diffraction-limited imaging and laser beam steering with a record field of view up to 178°.

Conclusions:

  • The developed metasurface design approach breaks through the limitations of traditional optical technologies.
  • The methodology is scalable to the entire optical band and other materials.
  • Enables unprecedented compact infrared systems for applications in surveillance, unmanned vehicles, and medical science.