A wide-angle dual-band infrared perfect absorber based on metaldielectricmetal split square-ring and square array

H. M. Lee, J. C. Wu

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The optical properties of a dual-band plasmonic absorber are delineated numerically by employing a finite element method. Based on a metaldielectricmetal scheme, the key structure consists of a lossless dielectric layer that is sandwiched by a silver split square-ring enclosing a silver square array and ground silver plane. The simulation results clearly show that near-perfect absorption efficiency can be realized for two absorption bands in the near-infrared wavelength range. The near-perfect absorption bands exhibit polarization insensitivity and wide-angle incidence. Notably, the absorption band is independently governed by the size of each part of the patterned films where the silver split square-ring determines the shorter wavelength band and the silver square determines the longer wavelength band, respectively. The repositioning of two near-perfect absorption peaks possesses a linear relationship that is related to the dimensions of the patterned silver layer. This allows for a flexible reconfigurability over the entire near-infrared regime.

Original languageEnglish
Article number205101
JournalJournal of Physics D: Applied Physics
Volume45
Issue number20
DOIs
Publication statusPublished - 2012 May 23

Fingerprint

Silver
absorbers
silver
Infrared radiation
rings
Absorption spectra
absorption spectra
Wavelength
wavelengths
finite element method
Optical properties
incidence
Polarization
Finite element method
optical properties
sensitivity
polarization
simulation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

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A wide-angle dual-band infrared perfect absorber based on metaldielectricmetal split square-ring and square array. / Lee, H. M.; Wu, J. C.

In: Journal of Physics D: Applied Physics, Vol. 45, No. 20, 205101, 23.05.2012.

Research output: Contribution to journalArticle

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