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Huygens' metasurface-based surface plasmon coupler with near-unit efficiency
Optics Letters
|May 23, 2023
Summary
This study introduces a novel Huygens
Area of Science:
- Optics and Photonics
- Metamaterials
- Nanotechnology
Background:
- Surface plasmon polaritons (SPPs) and spoof SPPs are crucial for high-speed information routing.
- Efficiently coupling light into these plasmonic modes without scattering or reflection is a significant challenge in integrated plasmonics.
Purpose of the Study:
- To propose and demonstrate a high-efficiency spoof SPP coupler.
- To overcome the limitations of existing methods for exciting confined plasmonic modes.
Main Methods:
- Design of a transparent Huygens' metasurface with integrated electrical and magnetic resonators.
- Optimization of a plasmonic metal to support eigen SPPs.
- Experimental validation in near- and far-field.
Main Results:
- Achieved over 90% coupling efficiency.
- Demonstrated full conversion of plane wave to surface wave propagation.
- Satisfied impedance-matching conditions across the metasurface.
Conclusions:
- The proposed Huygens' metasurface coupler offers a viable solution for high-efficiency spoof SPP excitation.
- This advancement has the potential to enable the development of next-generation high-performance plasmonic devices.
