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Updated: Jul 6, 2026

Synthesis and Operation of Fluorescent-core Microcavities for Refractometric Sensing
Published on: March 13, 2013
Light emission from sources located within metallodielectric planar microcavities
1Laboratoire d'Optique des Surfaces et des Couches Minces, Unité Propre de Recherche de l'Enseignement Supérieur Associée au Centre Nationale de Recherche Scientifique 6080, Microcavities Groupe, Ecole Nationale Supérieure de Physiques de Marseille, Domaine Universitaire de St Jérôme, 13397 Marseille Cedex 20, France. herve.rigneault@enspm.u-3mrs.fr
This study presents a formula for electromagnetic power in microcavities. All-dielectric structures offer better light extraction than metallodielectric ones due to metal absorption.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Planar microcavities are crucial for light manipulation.
- Understanding light extraction from microcavities is essential for device efficiency.
Purpose of the Study:
- Derive a formula for electromagnetic power in microcavities.
- Compare light extraction in metallodielectric versus all-dielectric resonant structures.
- Investigate the impact of metal absorption on light extraction efficiency.
Main Methods:
- Developed a simple, rigorous electromagnetic formula.
- Conducted numerical simulations.
- Performed experimental validation using europium chelates.
Main Results:
- The derived formula accurately predicts electromagnetic power.
- All-dielectric structures exhibit superior light extraction compared to metallodielectric ones.
- Metal absorption significantly reduces light extraction in metallodielectric microcavities, even with thin metal layers.
Conclusions:
- The study provides a predictive tool for microcavity electromagnetic power.
- All-dielectric resonant structures are advantageous for maximizing light extraction.
- Metal absorption is a critical limiting factor in metallodielectric microcavities.
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