Theory of Plasmon-Enhanced Metal Photoluminescence

Metal photoluminescence (MPL) originates from radiative recombination of photoexcited core holes and conduction band electrons. In metal nanostructures, MPL is enhanced due to the surface plasmon local field effect. We identify another essential process in plasmon-assisted MPLexcitation of Auger pl...

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Bibliographic Details
Published in:Nano letters 2013-01, Vol.13 (1), p.194-198
Main Author: Shahbazyan, Tigran V
Format: Article
Language:English
Subjects:
Augers
Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Conduction band
Cross-disciplinary physics: materials science
rheology
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Exact sciences and technology
Gold
Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties
Materials science
Mathematical analysis
Mathematical models
Nanocrystalline materials
Nanoparticles
Nanoscale materials and structures: fabrication and characterization
Nanostructure
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
Photoluminescence
Physics
Plasmons
Surface and interface electron states
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
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Description
Summary:Metal photoluminescence (MPL) originates from radiative recombination of photoexcited core holes and conduction band electrons. In metal nanostructures, MPL is enhanced due to the surface plasmon local field effect. We identify another essential process in plasmon-assisted MPLexcitation of Auger plasmons by core holesthat hinders MPL from small nanostructures. We develop a microscopic theory of plasmon-enhanced MPL that incorporates both plasmon-assisted enhancement and suppression mechanisms and derive the enhancement factor for MPL quantum efficiency. Our numerical calculations of MPL from Au nanoparticles are in excellent agreement with the experiment.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl303851z