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Using light to image millimeter wave based on stacked meta-MEMS chip.

Han Wang1,2, Zhigang Wang2, Cheng Gong3

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A novel metamaterial micro-electro-mechanical system (meta-MEMS) chip efficiently absorbs electromagnetic waves and converts them into mechanical energy for millimeter wave imaging. This breakthrough enables high-resolution, lens-less imaging with a fast response speed.

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Area of Science:

  • Metamaterials
  • Micro-electro-mechanical systems (MEMS)
  • Millimeter wave technology

Background:

  • Traditional millimeter wave imaging systems face challenges in terms of resolution and speed.
  • Metamaterials offer unique electromagnetic properties, while MEMS technology enables miniaturization and mechanical control.

Purpose of the Study:

  • To propose and demonstrate a stacked meta-MEMS chip for efficient millimeter wave detection and imaging.
  • To achieve high absorption rates and improved imaging performance in a compact form factor.

Main Methods:

  • Design and fabrication of a stacked "dielectric-resonant-air-ground" meta-MEMS chip.
  • Integration of metamaterial and MEMS structures for electromagnetic wave absorption and mechanical energy conversion.
  • Development of a light readout module for millimeter wave imaging performance testing.

Main Results:

  • Achieved an absorption rate of 99.8% at 94 GHz with a meta-MEMS chip thickness of 1/2500 wavelength.
  • Demonstrated lens-less millimeter wave imaging with a resolution of 1.5 mm.
  • Attained a response speed of 144 Hz for the meta-MEMS imaging system.

Conclusions:

  • The proposed meta-MEMS chip offers a promising solution for high-performance millimeter wave imaging.
  • The compact and efficient design enables applications requiring rapid, high-resolution millimeter wave detection.
  • This technology bridges visible light imaging principles with millimeter wave detection capabilities.