Compound Hertzian chain model for copper-carbon nanocomposites' absorption spectrum
Date
2011Source Title
Micro and Nano Letters
Print ISSN
17500443
Volume
6
Issue
4
Pages
277 - 279
Language
English
Type
ArticleItem Usage Stats
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Abstract
The infrared range optical absorption mechanism of carbon-copper composite thin layer coated on the diamond-like carbon buffer layer has been investigated. By consideration of weak interactions between copper nanoparticles in their network, optical absorption is modelled using their coherent dipole behaviour induced by the electromagnetic radiation. The copper nanoparticles in the bulk of carbon are assumed as a chain of plasmonic dipoles, which have coupling resonance. Considering nearest neighbour interactions for this metallic nanoparticles, surface plasmon resonance frequency (ω 0) and coupled plasmon resonance frequency (ω 1) have been computed. The damping rate against wavelength is derived, which leads to the derivation of the optical absorption spectrum in terms of ω 0 and ω 1. The dependency of the absorption peaks to the particle size and the particle mean spacing is also investigated. The absorption spectrum is measured for different Cu-C thin films with various Cu particle size and spacing. The experimental results of absorption are compared with the obtained analytical ones. © 2011 The Institution of Engineering and Technology.
Keywords
Absorption peaksChain models
Copper nanoparticles
Coupled plasmon
Coupling resonance
Damping rate
Diamond-like carbon
Electromagnetic radiation
Infrared range
Metallic nanoparticles
Nearest-neighbour interactions
Optical absorption
Optical absorption spectrum
Plasmonic
Surface plasmon resonance frequency
Thin layers
Weak interactions
Absorption
Absorption spectra
Copper
Electromagnetic waves
Light absorption
Nanocomposite films
Nanocomposites
Nanoparticles
Natural frequencies
Plasmons
Surface plasmon resonance
Thin films
Absorption spectroscopy
carbon
copper
nanocomposite
absorption spectroscopy
article
dipole
electromagnetic radiation
nonhuman
particle size
surface plasmon resonance
terahertz spectroscopy
Permalink
http://hdl.handle.net/11693/21964Published Version (Please cite this version)
http://dx.doi.org/10.1049/mnl.2011.0014Collections
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