Properties of the defect modes in 1D lossy photonic crystals containing two types of negative-index-material defects

Abstract

In this paper, the characteristic matrix method is employed to theoretically investigate the propagation of electromagnetic waves through one-dimensional defective lossy photonic crystals (PCs) composed of negative index materials (NIMs) and positive index materials (PIMs). We consider symmetric and asymmetric geometric structures with two different types of NIM defect layers at the center of the structure. The effects of the polarization and the angle of incidence on the defect modes in the transmission spectra of both structures are investigated. The results show that the number of the defect modes within the photonic band gap (PBG) depends on the type of the NIM defect layer and is independent of the geometrical structure.Moreover, it is shown that the defect mode frequency increases as the angle of incidence increases. This property is also independent of the geometry of the structure. The results can lead to designing new types of narrowband and multichannel transmission filters. *

Effects of loss factors on zero permeability and zero permittivity gaps in 1D photonic crystal containing DNG materials

“…As shown and mentioned in our previous reports [14,[24][25][26][27] and observed from the figure, there exists three different regions. In the first region, 3  and A  are positive (DPS material).…”

Loss factor dependence of defect mode in a 1D defective lossy photonic crystal containing DNG materials

“…As mentioned in our previous reports [45][46][47] and observed from the figure, the position and the height of the defect modes are affected by the refractive index of the defect layer. Moreover, the frequency of the defect mode shifts toward the lower frequency and the height of defect mode increases whenever the refractive index of the defect layer is positive i.e.…”

“…As shown and mentioned in our previous reports [13,26,46,47,49], for 3.13 f  GHz, the real parts of the permittivity and permeability,   and   , are simultaneously negative (DNG material). For 3.…”

“…As regards PCs and MetaPCs properties, several authors have reported the properties of the defect modes in different 1D conventional PC and 1D MetaPC defective structures by introducing positive or negative indices defects [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47], and several papers have investigated the dependency of defect modes on the incidence angle, polarization, lattice constant, geometric structure, and thickness of the layers in 1D PC and 1D lossless MetaPC. In this paper, the characteristic matrix method is used to survey the effects of the electric loss factor e  and the magnetic loss factor m  on the defect modes in the transmission spectra of 1D lossy MetaPC composed of DNG and DPS materials with a defect layer at the center of the structure.…”

Design and Simulation of All-Optical OR Logic Gate based on 2-D Photonic Crystal

“…It is form by a periodic arrangement of material so it is said to be a "crystal" and the term "photonic" is added since these crystals are designed to affect the propagation properties of photons (light). Depending on the dimension of periodicity, the PCs can be divided into one-dimensional (1D) [3][4][5][6], two-dimensional (2D) [7][8][9][10][11][12] and three-dimensional (3D) [13][14][15][16][17] structures. In two-dimensional (2D) structures, PCs impose periodicity of the permittivity in X and Z direction while in the third direction Y the medium is homogeneous.…”