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Using light to image millimeter wave based on stacked meta-MEMS chip
Han Wang1,2, Zhigang Wang2, Cheng Gong3
1Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin, 300350, China.
Light, Science & Applications
|January 21, 2025
Summary
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.
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.
