Tunable multiband metasurfaces based on plasmonic core-shell nanoparticles

Soheil Farazi, Farhad A. Namin, Douglas H. Werner

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Metasurfaces, which can act as wavelength-selective surfaces with multiple passbands or stopbands, have numerous applications, including modulating electromagnetic radiation, and transmitarray or reflectarray antennas. In this paper, the feasibility of such metasurfaces, using plasmonic core-shell nanoparticles, has been studied. By analyzing the polarizability of such particles, it is shown that they are capable of possessing two plasmonic resonances that can be tuned to specific wavelengths by adjusting their design parameters and the constitutive media. In addition, a passband exists in between these two bands. The surface susceptibilities of the metasurface are determined using "sparse approximation formulas." Analytical scattering coefficients were compared and found to agree with numerical results obtained using full-wave simulation.

Original languageEnglish (US)
Pages (from-to)658-666
Number of pages9
JournalJournal of the Optical Society of America B: Optical Physics
Volume35
Issue number4
DOIs
StatePublished - Apr 1 2018

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nanoparticles
selective surfaces
scattering coefficients
wavelengths
electromagnetic radiation
antennas
adjusting
magnetic permeability
approximation
simulation

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

Cite this

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abstract = "Metasurfaces, which can act as wavelength-selective surfaces with multiple passbands or stopbands, have numerous applications, including modulating electromagnetic radiation, and transmitarray or reflectarray antennas. In this paper, the feasibility of such metasurfaces, using plasmonic core-shell nanoparticles, has been studied. By analyzing the polarizability of such particles, it is shown that they are capable of possessing two plasmonic resonances that can be tuned to specific wavelengths by adjusting their design parameters and the constitutive media. In addition, a passband exists in between these two bands. The surface susceptibilities of the metasurface are determined using {"}sparse approximation formulas.{"} Analytical scattering coefficients were compared and found to agree with numerical results obtained using full-wave simulation.",
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Tunable multiband metasurfaces based on plasmonic core-shell nanoparticles. / Farazi, Soheil; Namin, Farhad A.; Werner, Douglas H.

In: Journal of the Optical Society of America B: Optical Physics, Vol. 35, No. 4, 01.04.2018, p. 658-666.

Research output: Contribution to journalArticle

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