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Updated: Apr 1, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Published on: July 21, 2018

Guiding SPPs with PT-symmetry.

Fan Yang¹, Zhong Lei Mei^1,2

¹School of Information Science and Engineering, Lanzhou University, Lanzhou 730000, China.

Scientific Reports

|October 9, 2015

Summary

This study introduces parity-time (PT) symmetry in surface plasmon polaritons (SPPs) for the first time. The research demonstrates asymmetric propagation in SPP systems, paving the way for novel PT-waveguides and PT-cloaks.

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Area of Science:

Optics and Photonics
Condensed Matter Physics
Electromagnetism

Background:

Surface plasmon polaritons (SPPs) are electromagnetic waves confined to metal-dielectric interfaces.
Controlling the propagation of SPPs is crucial for developing advanced photonic devices.
Parity-time (PT) symmetry offers a novel framework for manipulating wave phenomena.

Purpose of the Study:

To propose and experimentally confirm the concept of parity-time (PT) symmetry in SPP systems.
To investigate the asymmetric propagation of light induced by PT symmetry in SPPs.
To explore potential applications of PT-symmetric SPPs in photonic devices.

Main Methods:

Theoretical prediction of PT symmetry in SPPs by introducing periodic modulation of the effective refractive index.
Numerical simulations to demonstrate the predicted asymmetric propagation.
Validation of the PT symmetry concept in SPP systems.

Main Results:

Successful proposal and confirmation of PT symmetry in SPPs.
Demonstration of theoretically predicted asymmetric propagation in periodically modulated SPP systems.
Numerical validation of the PT symmetry concept.

Conclusions:

The concept of PT symmetry is applicable and demonstrable in SPP systems.
PT-symmetric SPPs enable asymmetric light propagation.
The validated PT symmetry concept has wide applicability in SPP-based devices, including PT-waveguides and PT-cloaks.