On/Off Switching of Absorption Spectra by Layer Shifting for Double-Layer Metamaterial-Based Absorber


EKMEKÇİ E., DEMIR E.

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, vol.15, pp.532-535, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 15
  • Publication Date: 2016
  • Doi Number: 10.1109/lawp.2015.2457091
  • Journal Name: IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.532-535
  • Keywords: Absorbing media, closed-ring resonators, double-layer absorber, metamaterials, BROAD-BAND, PERFECT ABSORBER
  • Süleyman Demirel University Affiliated: Yes

Abstract

This letter presents on/off switching of absorption spectra by layer shifting for double-layer resonator structures. For the proof of concept, a single-layer double-closed-ring resonator structure (DCRR) is designed, fabricated, and characterized in S-band. In experiments, the structure individually shows two absorption peaks at 2.77 and 3.77 GHz. Additionally, a double-layer structure is constructed by repeating identical single-layer DCRR structure along propagation direction and leaving a 1-mm-thick air gap in between them. In the double-layer case, the structure presents three absorption peaks at 2.74, 3.24 and 3.73 GHz. Finally, shifting the layers horizontally for 5-, 10-, 20-, and 30-mm shift amounts reveals that the first absorption peak disappears for 5- and 10-mm and the third absorption peak disappears for 5-mm shift cases.