Tunable omnidirectional band gap properties of 1D plasma annular periodic multilayer structure based on an improved Fibonacci topological structure

• Published in: Optical and quantum electronics 2021-05, Vol.53 (5), Article 256
• Main Authors: Peng, Hong-Mei, Wan, Bao-Fei, Wang, Peng-Xiang, Zhang, Dan, Zhang, Hai-Feng
• Format: Article
• Language: English
• Subjects: Bandwidths; Characterization and Evaluation of Materials; Computer Communication Networks; Crystal structure; Cylindrical plasmas; Electrical Engineering; Electromagnetic wave filters; Fibonacci numbers; Frequency ranges; Lasers; Multilayers; Narrowband; Optical Devices; Optics; Photonic band gaps; Photonic crystals; Photonics; Physics; Physics and Astronomy; Plasma; Plasma frequencies; Substrates; Topology; Waveguides
• ISSN: 0306-8919; 1572-817X
• DOI: 10.1007/s11082-021-02912-0

In this paper, the characteristics of the omnidirectional band gap (OBG) for one-dimensional plasma cylindrical photonic crystals based on an improved Fibonacci topological structure are researched. The influences of the azimuthal mode number ( m ), incident angle ( θ ), plasma thickness ( d p ), and plasma frequency ( ω p ) on the OBG are discussed. These conclusions are drawn that m has a strong ability to regulate the OBG. As m increased, the OBG will be broadened. The θ has a similar ability in adjusting the photonic band gap (PBG), a larger θ will get a wider PBG. When θ  = 85°, the TM wave achieves the PBG in the range of 0–3 (2π c / d ). So the ultra-wide PBG can be got by the large θ . Contrary to m , d p has an inverse relationship with the bandwidth of the OBG. As d p increases, the bandwidth of the OBG will be decreased. Fortunately, the frequency range of the OBG can be controlled by d p . But ω p cannot regulate the bandwidth of the OBG. Increasing m and reducing d p appropriately can obtain a lower frequency and wider OBG. This feature is very beneficial to designing devices such as waveguides, filters, and antenna substrates. In addition, an interesting phenomenon can be found when m  = 2, an extra high reflection zone can be inspired in the TM wave. It provides a theoretical support for designing the narrowband filters without introducing any physical defect layers in the structure.