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Related Experiment Video

Updated: Oct 11, 2025

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

Study on Localized Surface Plasmon Coupling with Many Radiators.

Zhizhong Chen¹, Chuhan Deng¹, Xin Xi¹

¹State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China.

Nanomaterials (Basel, Switzerland)

|November 27, 2021

Summary

This summary is machine-generated.

Localized surface plasmons (LSP) from silver nanoparticles enhance green LED luminescence by coupling with quantum wells. This study explores nanoparticle arrangement and morphology effects, achieving up to 4.5x photoluminescence intensity increase.

Keywords:

cathodoluminescence dipole light emitting diode localized surface plasmon many radiators perturbation method

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Area of Science:

Materials Science
Optoelectronics
Nanotechnology

Background:

Localized surface plasmons (LSP) are crucial for light-matter interactions in nanostructures.
Silver nanoparticles (Ag NPs) are widely used for their plasmonic properties.
Enhancing light emission in light-emitting diodes (LEDs) is a key goal in optoelectronics.

Purpose of the Study:

To investigate the coupling of localized surface plasmons (LSP) with multiple radiators in green LEDs.
To understand how Ag NP morphology and arrangement influence LSP resonance and light emission.
To explore methods for enhancing luminescence in LEDs using plasmonic nanoparticles.

Main Methods:

Excitation of Ag NPs (random and arrayed) using lasers or electron beams in p-GaN based green LEDs.
Photoluminescence (PL) and cathodoluminescence (CL) intensity measurements.
Finite Difference Time Domain (FDTD) simulations using dipole approximations for quantum wells (QWs) and incorporating NP interactions.

Main Results:

Periodic Ag NPs increased photoluminescence intensity up to 4.5 times compared to bare LEDs.
Ag NP morphology significantly affects LSP resonance intensity and light scattering.
FDTD simulations showed amplified enhancement and reduced energy dissipation through SP dipole coupling with Ag NPs, especially with z-dipole introduction under electron beam excitation.

Conclusions:

LSP coupling with quantum wells in green LEDs offers a viable route for luminescence enhancement.
Optimizing Ag NP structure and placement is critical for maximizing plasmonic enhancement effects.
The study provides insights into the complex interactions governing plasmon-LED performance, including resonator and antenna effects.