Electromagnetic optimization of corrugated metallic sheets for maximum power focusing

Altinoklu A., Karaosmanoglu B., ERGÜL Ö. S.

JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS, vol.31, no.8, pp.837-849, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 31 Issue: 8
  • Publication Date: 2017
  • Doi Number: 10.1080/09205071.2017.1319299
  • Journal Name: JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.837-849
  • Keywords: Corrugated metals, electromagnetic optimization, method of moments, optical focusing, TOPOLOGY OPTIMIZATION, GENETIC OPTIMIZATION, SCATTERING, DESIGN, ALGORITHM, EFFICIENT, ANTENNAS
  • Middle East Technical University Affiliated: Yes

Abstract

We present full-wave electromagnetic optimization of corrugated metallic sheets to achieve maximum power focusing at desired locations when illuminated by plane waves. The corrugations are freely applied by moving the discretization nodes, leading to huge optimization spaces that are scanned by employing genetic algorithms. The required simulations are performed accurately and efficiently via the method of moments or the multilevel fast multipole algorithm. Hundreds of thousands of simulations are performed to demonstrate the feasibility of strong optical focusing, even with relatively small sheets in terms of wavelength. The corrugated sheets can be useful in various applications, such as energy harvesting, solar cells, imaging, and optical sensing.