Scattering characteristics of relativistically moving concentrically layered spheres

Timothy J. Garner, Akhlesh Lakhtakia, James K. Breakall, Craig F. Bohren

Research output: Contribution to journalArticle

Abstract

The energy extinction cross section of a concentrically layered sphere varies with velocity as the Doppler shift moves the spectral content of the incident signal in the sphere's co-moving inertial reference frame toward or away from resonances of the sphere. Computations for hollow gold nanospheres show that the energy extinction cross section is high when the Doppler shift moves the incident signal's spectral content in the co-moving frame near the wavelength of the sphere's localized surface plasmon resonance. The energy extinction cross section of a three-layer sphere consisting of an olivine-silicate core surrounded by a porous and a magnetite layer, which is used to explain extinction caused by interstellar dust, also depends strongly on velocity. For this sphere, computations show that the energy extinction cross section is high when the Doppler shift moves the spectral content of the incident signal near either of olivine-silicate's two localized surface phonon resonances at 9.7 μm and 18 μm.

Original languageEnglish (US)
Pages (from-to)362-366
Number of pages5
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume382
Issue number5
DOIs
StatePublished - Feb 6 2018

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extinction
scattering
cross sections
olivine
shift
silicates
energy
surface plasmon resonance
magnetite
hollow
dust
gold
wavelengths

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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abstract = "The energy extinction cross section of a concentrically layered sphere varies with velocity as the Doppler shift moves the spectral content of the incident signal in the sphere's co-moving inertial reference frame toward or away from resonances of the sphere. Computations for hollow gold nanospheres show that the energy extinction cross section is high when the Doppler shift moves the incident signal's spectral content in the co-moving frame near the wavelength of the sphere's localized surface plasmon resonance. The energy extinction cross section of a three-layer sphere consisting of an olivine-silicate core surrounded by a porous and a magnetite layer, which is used to explain extinction caused by interstellar dust, also depends strongly on velocity. For this sphere, computations show that the energy extinction cross section is high when the Doppler shift moves the spectral content of the incident signal near either of olivine-silicate's two localized surface phonon resonances at 9.7 μm and 18 μm.",
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Scattering characteristics of relativistically moving concentrically layered spheres. / Garner, Timothy J.; Lakhtakia, Akhlesh; Breakall, James K.; Bohren, Craig F.

In: Physics Letters, Section A: General, Atomic and Solid State Physics, Vol. 382, No. 5, 06.02.2018, p. 362-366.

Research output: Contribution to journalArticle

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