Transmission control by asymmetric electromagnetically induced transparency-like metamaterials in transverse electromagnetic waveguide

BAĞCI F., Akaoglu B.

PHYSICS LETTERS A, cilt.383, sa.35, 2019 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 383 Sayı: 35
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.physleta.2019.126000
  • Dergi Adı: PHYSICS LETTERS A
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Electromagnetically induced transparency, Metamaterial, Radiative resonance, Surface current distributions, Modulation ratio, ANALOG, REALIZATION, SYMMETRY, BREAKING
  • Ankara Üniversitesi Adresli: Evet

Özet

We numerically and experimentally present passive and active electromagnetically induced transparency-like metamaterials in a TEM waveguide under normal excitation. Asymmetry of the metamaterial unit cell leads to the splitting of the radiative resonance. Surface current distributions are analyzed to account for each resonance. Moreover, by implementing a varactor diode to one of the gaps of the double-split ring resonator, electromagnetically induced transmission-like band is shifted in frequency and the corresponding bandwidth is modulated. A modulation ratio of 29.5 dB in transmission is experimentally demonstrated by only increasing the bias voltage 4 volts. (C) 2019 Elsevier B.V. All rights reserved.