Tungsten Nanowire Metamaterials as Selective Solar Thermal Absorbers by Excitation of Magnetic Polaritons

Jui Yung Chang, Hao Wang, Liping Wang

Research output: Contribution to journalArticle

  • 4 Citations

Abstract

The present study focuses on nanowire-based metamaterials selective solar absorbers. Finite-difference time-domain (FDTD) simulation is employed for numerically designing a broadband solar absorber made of lossy tungsten nanowires which exhibit spectral selectivity due to the excitation of magnetic polariton (MP). An inductor-capacitor circuit model of the nanowire array is developed in order to predict the resonance wavelengths of the MP harmonic modes. The effects of geometric parameters such as nanowire diameter, height, and array period are investigated and understood by the sweep of geometric parameters, which tunes the MP resonance and the resulting optical and radiative properties. In addition, the optical properties and conversion efficiency of this nanowire-based absorber are both demonstrated to be insensitive on incidence angles, which illustrates the potential applicability of the proposed nanowire-based metamaterial as a high-efficiency wide-angle selective solar absorber. The results show that the nanowire-based selective solar absorber with base geometric parameters can reach 83.6% of conversion efficiency with low independence of incident angle. The results will facilitate the design of novel low-cost and high-efficiency materials for enhancing solar thermal energy harvesting and conversion.

LanguageEnglish (US)
Article number052401
JournalJournal of Heat Transfer
Volume139
Issue number5
DOIs
StatePublished - May 1 2017

Fingerprint

Tungsten
Metamaterials
polaritons
Nanowires
Solar absorbers
absorbers
tungsten
nanowires
excitation
Conversion efficiency
optical properties
Energy harvesting
inductors
Magnetic resonance
Hot Temperature
Thermal energy
Energy conversion
thermal energy
capacitors
Capacitors

Keywords

  • magnetic polariton
  • metamaterial
  • nanowires
  • solar absorber

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Tungsten Nanowire Metamaterials as Selective Solar Thermal Absorbers by Excitation of Magnetic Polaritons. / Chang, Jui Yung; Wang, Hao; Wang, Liping.

In: Journal of Heat Transfer, Vol. 139, No. 5, 052401, 01.05.2017.

Research output: Contribution to journalArticle

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