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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
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Phase-controlled direction-tunable coupling of surface plasmon polaritons based on a plasmonic waveguide array
Applied Optics
|August 12, 2025
Summary
A novel plasmonic phased array (PPA) coupler enables phase-controlled steering of surface plasmon polaritons (SPPs). This device offers dynamic direction tuning for applications in nano-optics and integrated optics.
Area of Science:
- Plasmonics
- Integrated Optics
- Nano-optics
Background:
- Surface plasmon polaritons (SPPs) are crucial for nanoscale light manipulation.
- Controlling SPP directionality is essential for integrated photonic circuits.
Purpose of the Study:
- To design and investigate a phase-controlled, direction-tunable SPP coupler.
- To explore the steering capabilities and underlying physics of the proposed device.
Main Methods:
- Finite-difference time-domain (FDTD) simulations were used for theoretical investigation.
- The pattern multiplication principle was employed for analyzing tunable properties.
Main Results:
- A 7-element plasmonic phased array (PPA) based coupler demonstrated dynamic SPP steering up to 59.5°.
- Increasing PPA element number enhances steering range and narrows the main lobe.
- Simulation results were validated by theoretical analysis, deepening understanding of the steering mechanism.
Conclusions:
- The designed SPP coupler offers efficient, phase-controlled direction tuning without mechanical components.
- Environmental effects were analyzed, providing insights for future device optimization.
- The device holds significant potential for applications in nano-optics and integrated optics.
