Properties of a binary photonic crystal with an inverted symmetry and a defect layer
- PDF / 2,113,077 Bytes
- 13 Pages / 439.37 x 666.142 pts Page_size
- 14 Downloads / 174 Views
Properties of a binary photonic crystal with an inverted symmetry and a defect layer Sofyan A. Taya1,a , Nael Doghmosh1, Zaher M. Nassar1, Anas A. Alkanoo1, Anurag Upadhyay2 1 Physics Department, Islamic University of Gaza, Gaza, Palestine 2 Department of Applied Science & Humanities, Rajkiya Engineering College, Azamgarh, U.P., India
Received: 15 July 2020 / Accepted: 17 November 2020 © Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In the current work, two binary photonic crystals (BPCs) are investigated and compared. The first is composed of two layers A and B repeated 2 N times. In the first Nrepetitions, they have the order AB and in the next repetitions, they have the order BA so that the BPC has an inverted symmetry with the structure (AB)N (BA)N . In the second BPC, the two repetitions have the same order AB with a defect layer C which is introduced between them so that it has a normal symmetry with a defect layer with the structure (AB)N C(AB)N . The properties of both BPCs are investigated and compared. It is found that the widths of the band gaps in the inverted symmetry BPC are larger than those of the normal symmetry BPC containing the defect mode. Both structures can have defect modes in the transmission spectra.
1 Introduction Investigation and experimental demonstration of photonic crystals (PCs) have received an increasing interest due to many potential applications in optoelectronics. Developing new devices based on PCs has become an important new direction in optical sciences. PCs exclusively combine radiation localization and dispersion properties which permit efficient control of light beams. Novel options emerge in the resonance PCs, in which their intrinsic spectral and dispersion properties are accompanied by the properties of impurity atoms [1, 2] and quantum wells [3, 4] embedded into them. These structures show abnormal nonlinear and linear optical properties and are of high interest not only to physicists but also to the engineers because of possible application in the field optical devices development, for example, optical memory [5], and microtransistors [1]. Although the two and three-dimensional PC was used for numerous applications, the fabrication of feasibility like high refractive index contrast and testing precision especially in the region of visible spectrum is somewhat complicated. Therefore, the general interest was directed to the one-dimensional PC structure with the uncomplicated process of fabrication and it was inferred that does not support of omnidirectional while following the Brewster effect. Producing the exclusive property, several one-dimensional devices were investigated such as multiplexer [6], resonator [7], polarization controller [8], reflector [9], switches [10],
a e-mail: [email protected] (corresponding author)
0123456789().: V,-vol
123
935
Page 2 of 13
Eur. Phys. J. Plus
(2020) 135:935
refractometer [11] and filter [12]. Since the PC fabrication for both IR and visible regions was consider
Data Loading...
