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Ultra-wideband surface plasmonic Y-splitter.
Optics Express
|September 15, 2015
Summary
We developed an ultra-wideband Y-splitter using spoof surface plasmonic polaritons (SSPPs) in planar metamaterials. This device equally divides power, functioning as a 3dB power divider across a broad frequency range.
Area of Science:
- Terahertz (THz) and Microwave Photonics
- Metamaterials and Plasmonics
Background:
- Planar plasmonic devices are crucial for integrated circuits.
- Efficient power division is essential for signal processing in various frequency ranges.
Purpose of the Study:
- To design and demonstrate an ultra-wideband Y-splitter using spoof surface plasmonic polaritons (SSPPs).
- To achieve equal power division (3dB) over a broad frequency spectrum.
Main Methods:
- Utilized planar THz plasmonic metamaterials with H-shaped structures.
- Designed a straight waveguide feeding two branch waveguides supporting SSPPs.
- Scaled down the design to microwave frequencies for experimental validation.
Main Results:
- The Y-splitter demonstrated equal power division across an ultra-wideband frequency range.
- Experimental results at microwave frequencies validated the device's functionality.
- SSPPs in the straight and branch waveguides exhibited similar dispersion and mode characteristics.
Conclusions:
- The proposed Y-splitter design effectively achieves ultra-wideband 3dB power division.
- The device shows promise for applications in future plasmonic circuits in both microwave and THz ranges.
