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Coupling Strength and Total Damping Govern Electromagnetically Induced Absorption in Coupled Plasmonic Systems

Title data

Matsumori, Kishin ; Fujimura, Ryushi ; Retsch, Markus:
Coupling Strength and Total Damping Govern Electromagnetically Induced Absorption in Coupled Plasmonic Systems.
In: Advanced Photonics Research. Vol. 4 (2023) Issue 6 . - 2200211.
ISSN 2699-9293
DOI: https://doi.org/10.1002/adpr.202200211

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Abstract in another language

Electromagnetically induced absorption (EIA) is an optical phenomenon that enhances light absorption of plasmonic systems. Depending on the plasmonic system under investigation, the decisive role of intrinsic versus radiative damping and phase retardation has been pointed out to control the EIA. Herein, a unified interpretation is provided and the mechanism of EIA for plasmonic–dielectric composites and all-plasmonic dipolar–quadrupolar antennas is unraveled. In this theoretical work, the finite element method is used to elucidate how EIA is attributed to an absorption enhancement of a resonance mode excited by near-field coupling. For a fundamental understanding, a quantitative analysis is developed by designing an extended coupled-oscillator model. A critical parameter to maximize EIA is found, which is different from previous interpretations of such coupled plasmonic systems. Namely, the ratio of coupling strength to the total damping of the entire system controls EIA. The generalized interpretation of EIA given by this work can be applied to many plasmonic systems and is essential for designing future optical components and devices.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: electromagnetically induced absorption (EIA); electromagnetically induced transparency (EIT); light absorption; near-field coupling, plasmonics
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry I > Chair Physical Chemistry I - Univ.-Prof. Dr. Markus Retsch
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry I
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 23 Mar 2024 22:01
Last Modified: 25 Mar 2024 07:10
URI: https://eref.uni-bayreuth.de/id/eprint/89016