Properties of Defect Modes in Periodic Lossy Multilayer with Negative-Index-Materials

Abstract

Transmission properties of one-dimensional lossy photonic crystals composed of negative and positive refractive index layers with one lossless defect layer at the center of the crystal are investigated by the characteristic matrix method. The results show that as the refractive index and thickness of the defect layer increase the frequency of the defect mode decreases. In addition, it is shown that the frequency of the defect mode is sensitive to the incidence angle, polarization and physical properties of the defect layer but it is insensitive to the small lattice loss factor. The height of the defect mode is very sensitive to the loss factor, incidence angle, polarization, refractive index and thickness of the defect layer. It was also shown that the height and the width of the defect mode are affected by the number of the lattice period and the loss factor.The results can lead to designing new types of narrow filter structures and other optical devices. * email address: alireza.aghajamali@fsriau.ac.ir † email address: barati@susc.ac.ir

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 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.…”

Analysis of cutoff frequency in a one-dimensional superconductor-metamaterial photonic crystal

“…These materials are called metamaterials or negative index materials (NIMs) with simultaneously negative permittivity and permeability, known as lefthanded materials or metamaterials [11]. In addition, their peculiar properties, the experimental investigation of metamaterials at microwave frequencies by Smith et al, [12] devoted the attention toward the usage of metamaterials in the designs and the fabrications of PCs.…”