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Updated: Jun 5, 2026
07:39
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Deterministic relief dielectric structures to realize phase modulation of surface-plasmon polaritons
1School of Electrical & Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798.
Optics Letters
|December 18, 2010
Summary
We developed a new model to design dielectric structures for phase modulation of surface-plasmon polaritons (SPPs). This method optimizes structure length to control SPP wave phase shifts, improving focusing efficiency.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Surface-plasmon polaritons (SPPs) are electromagnetic waves confined to metal-dielectric interfaces.
- Controlling SPP phase is crucial for optical device miniaturization and advanced functionalities.
Purpose of the Study:
- To propose a modified effective-refractive-index model for designing relief dielectric structures on metal surfaces.
- To achieve precise phase modulation of SPPs using these structures.
- To optimize dielectric structure length for enhanced SPP phase shifting and focusing efficiency.
Main Methods:
- Development of a modified effective-refractive-index model.
- Optimization of dielectric structure length considering SPP losses.
- Design of a one-dimensional dielectric Fresnel zone plate as a demonstration.
Main Results:
- The proposed model enables effective phase modulation of SPPs.
- Optimized dielectric structure length leads to significant phase shifting.
- Demonstrated highest focusing efficiency for SPPs using the designed Fresnel zone plate.
Conclusions:
- The modified effective-refractive-index model is a viable tool for designing SPP phase modulators.
- This approach facilitates the development of efficient SPP-based optical components.
- The study highlights the potential for high focusing efficiency in SPP devices.
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