Harnessing a Dielectric/Plasma Photonic Crystal as an Optical Microwave Filter: Role of Defect Layers and External Magnetic Fields

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Dakhlaoui H., Belhadj W., Elabidi H., Al-Shameri N. S., UNGAN F., Wong B. M.

Materials, cilt.17, sa.3, 2024 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 17 Sayı: 3
  • Basım Tarihi: 2024
  • Doi Numarası: 10.3390/ma17030559
  • Dergi Adı: Materials
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, CAB Abstracts, Communication Abstracts, Compendex, INSPEC, Metadex, Veterinary Science Database, Directory of Open Access Journals, Civil Engineering Abstracts
  • Anahtar Kelimeler: angle of incidence, one-dimensional photonic crystal, plasma, transfer matrix method, transmittance spectrum
  • Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

We investigate the transmittance spectrum of a multichannel filter composed of dielectric (Formula presented.) and plasma (Formula presented.) materials in the microwave region within the transfer matrix formalism. Two configurations of the proposed filter are studied under the influence of an applied magnetic field: (1) a periodic structure containing (Formula presented.) unit cells surrounded by air and (2) the introduction of a second dielectric material (Formula presented.) acting as a defect layer to produce an (Formula presented.) structure. Our findings reveal that in the periodic case, the number of resonant states of the transmittance increases with number (Formula presented.) ; however, the observed blue and red shifts depend on the intensity and orientation of the applied magnetic field. We present contour plots of the transmission coefficients that show the effect of the incident angle on the shifts of the photonic band gaps. Furthermore, we find that the introduction of a defect layer generates additional resonant states and merges the central resonant peak into a miniband of resonances. Moreover, we show that the number of resonant peaks and their locations can be modulated by increasing the unit cell number, (Formula presented.), as well as increasing the width of the inserted defect layer. Our proposed structures enable the design of novel photonic filters using magnetized plasma materials operating in the microwave region.