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Flexible manipulation of terahertz wave reflection using polarization insensitive coding metasurfaces.
Optics Express
|December 10, 2017
Summary
We developed polarization-insensitive coding metasurfaces using notched-wheel structures for 3-bit encoding. These metasurfaces control terahertz wave reflection and reduce radar cross-section (RCS) significantly across a wide band.
Area of Science:
- Metasurfaces
- Terahertz Wave Manipulation
- Electromagnetics
Background:
- Metasurfaces offer precise control over electromagnetic waves.
- Achieving polarization-insensitive operation and broadband performance in metasurfaces remains a challenge.
Purpose of the Study:
- To propose and investigate notched-wheel structures for polarization-insensitive coding metasurfaces.
- To enable 3-bit encoding for terahertz wave manipulation.
- To suppress backward scattering and reduce radar cross-section (RCS).
Main Methods:
- Designed notched-wheel structures for coding metasurfaces.
- Employed specific coding sequences (e.g., "00110011…" and random sequences) along the x-axis.
- Investigated polarization-insensitive properties and terahertz wave reflection control.
- Analyzed backward scattering and RCS reduction.
Main Results:
- Demonstrated polarization-insensitive control of terahertz wave reflection.
- Achieved flexible manipulation of terahertz wave reflection by designing coding sequences.
- Obtained significant backward scattering suppression with RCS reduction below -10dB over a wide band.
Conclusions:
- Notched-wheel structures are effective for polarization-insensitive coding metasurfaces.
- The proposed approach enables advanced terahertz wave manipulation and stealth applications.
- This work paves the way for novel terahertz devices with tailored electromagnetic responses.
