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Terahertz spoof surface plasmonic demultiplexer based on band-stop waveguide units
Applied Optics
|October 18, 2022
Summary
This study introduces a terahertz spoof surface plasmonic demultiplexer that separates three frequencies using metallic pillars. This device is crucial for advancing terahertz integrated communication systems.
Area of Science:
- Photonics and Plasmonics
- Terahertz Technology
- Integrated Circuits
Background:
- Demultiplexers are vital for wavelength division multiplexing optical systems.
- Terahertz integrated circuits are essential for future communication technologies.
Purpose of the Study:
- To propose a novel terahertz spoof surface plasmonic demultiplexer.
- To demonstrate frequency distinction using a band-stop effect.
Main Methods:
- Designing waveguide units with metallic pillars of varying sizes.
- Exploiting the band-stop effect for frequency splitting.
- Achieving non-overlapping passbands by selecting appropriate waveguide parameters.
Main Results:
- A terahertz spoof surface plasmonic demultiplexer distinguishing three frequencies.
- Extinction ratios of 21.5 dB, 18.0 dB, and 23.9 dB at 0.578 THz, 0.632 THz, and 0.683 THz.
- Effective working section length of 1 mm for band-stop units.
Conclusions:
- The proposed band-stop unit offers tunable characteristics for terahertz applications.
- This demultiplexer has significant potential for terahertz integrated communication systems.
- The device is applicable to terahertz on-chip plasmonic circuitry.
