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Updated: Nov 9, 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

Directional two-photon induced surface plasmon-coupled emission.

Ignacy Gryczynski¹, Joanna Malicka¹, Joseph R Lakowicz¹

¹Center for Fluorescence Spectroscopy, University of Maryland at Baltimore, Department of Biochemistry and Molecular Biology, 725 West Lombard Street, Baltimore, MD 21201, USA.

Thin Solid Films

|April 8, 2021

Summary

This summary is machine-generated.

We demonstrated directional surface plasmon-coupled emission (SPCE) using two-photon absorption. This technique enhances immunoassays and DNA detection, showing potential for improved biosensing applications.

Keywords:

Fluorescence Silver Surface plasmons

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Area of Science:

Optics and Photonics
Materials Science
Biotechnology

Background:

Surface plasmon-coupled emission (SPCE) offers directional light emission.
Two-photon absorption enables excitation with near-infrared light, reducing photodamage and increasing penetration depth.

Purpose of the Study:

To measure directional SPCE induced by two-photon absorption.
To investigate the influence of excitation configuration on two-photon induced SPCE.
To explore potential applications of this phenomenon in biosensing.

Main Methods:

A rhodamine 123-doped poly(vinyl alcohol) film was deposited on a silvered glass slide.
The sample was coupled to a hemicylindrical glass prism.
Excitation was performed using an 820 nm femtosecond Ti:Sapphire laser in Kretschmann and reverse Kretschmann configurations.

Main Results:

Directional SPCE was successfully measured and induced by two-photon absorption.
The angular distribution of the two-photon induced SPCE was independent of the excitation configuration.
The observed SPCE phenomenon shows promise for enhanced signal detection.

Conclusions:

Two-photon absorption can induce directional SPCE.
The excitation configuration does not affect the angular distribution of two-photon induced SPCE.
This method holds potential for improving immunoassays and deoxyribonucleic acid detection.