Metamaterial absorber comprised of butt-facing U-shaped nanoengineered gold metasurface

Masih Ghasemi, Pankaj Kumar Choudhury, Vijay Kumar Thakur

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The paper reports spectral features of the absorbed electromagnetic (EM) waves in a new kind of multilayered plasmonic metamaterial thin film comprised of homogenous layers of copper and silicon as the bottom and the middle sections (of the thin film), respectively, and the inhomogeneous U-shaped nanoengineered gold layer as the top. Each unit cell of the top metasurface consists of one upside and one downside U-shaped (butt-facing) structure. The absorbance of EM waves is simulated in the wavelength range of 200-1500 nm under different incidence angles considering the wave as being transmitted from the metasurface side. The low-order TE and TM modes are taken into account for the estimation of wave absorbance under varying metasurfaces as well as silicon layer thicknesses. It has been found that the nanoengineered gold layer causes higher confinement of power in silicon, which can be further controlled by suitably adjusting its thickness. Further, the increased thickness of metasurface results in shifts in absorption peak along with the existence of dual-absorption maxima in the visible spectral range. The obtained spectral features reveal possible application of the proposed structure as a prudent metamaterial absorber, which can be exploited for EM heating purposes.

Original languageEnglish
Article number451
JournalEnergies
Volume9
Issue number6
DOIs
Publication statusPublished - 2016

Fingerprint

Facings
Metamaterials
Absorber
Gold
Silicon
Electromagnetic waves
Electromagnetic Wave
Thin Films
Thin films
Absorption
Plasmonics
Copper
Range of data
Heating
Wavelength
Incidence
Angle
Unit
Cell

Keywords

  • Complex optical mediums
  • Metamaterial absorbers
  • Nanostructured mediums
  • Plasmonic resonators

ASJC Scopus subject areas

  • Computer Science(all)

Cite this

Metamaterial absorber comprised of butt-facing U-shaped nanoengineered gold metasurface. / Ghasemi, Masih; Choudhury, Pankaj Kumar; Thakur, Vijay Kumar.

In: Energies, Vol. 9, No. 6, 451, 2016.

Research output: Contribution to journalArticle

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