In the present paper a novel structure for optical channel drop filter (CDF) based on photonic crystal ring resonator with circular core has been proposed. In order to design the proposed CDF, the plan wave expansion (PWE) method is applied for calculation of band structure and photonic band gap while the transmission characteristics of proposed CDF have been calculated using the finite differe...

The two dimensional with a triangular-lattice cross sectional pattern of elliptic air holes photonic crystal fiber (PCF) is investigated in detail by use of plan wave expansion (PWE) method. Using PWE method, the dependence of dispersion on structure parameters is calculated. We compared the dispersion relations between the circular air holes PCF and the elliptic one. We find that the flatter d...

Photonic crystal ring resonators (PCRRs) are traditional structures fordesigning optical channel drop filters. In this paper, Photonic crystal channel drop filter(CDFs) with a new configuration of ring resonator is presented. The structure is made ofa square lattice of silicon rods with the refractive index nsi=3. 4 which are perforated inair with refractive index nair=1. Calculations of band s...

A plasma photonic crystal (PPC) was formed using an array of discharge tubes. The transmission spectra and bandstructure PPCs with different lattice types under polarization modes were studied through simulation measurement. To study the bandgap in PPCs, PPC is calculated symplectic finite difference time domain (SFDTD), a modified plane wave expansion (PWE) method, element method (FEM) based o...

Abundant research suggests that the study of lay theories helps to explain intergroup relations. Building on this work as well as ‘‘interactionist’’ theories for understanding social behaviour from developmental and social psychology, we propose an integrative social-developmental perspective examining how lay perceivers’ characteristics (e.g., age, race, psychological motivations) interact wit...

The plane wave expansion method for calculating magneto-photonic crystals (MPCs) is modified via complex Fourier factorization whose basic principles are briefly explained. The new approach is used to simulate the photonic band structure of a twodimensional MPC made as Bi:YIG rods arranged with square periodicity. The considerable improvement of the convergence properties is demonstrated for se...

On the basis of Maxwell's equations and a plane wave expansion method, photonic band structure is computed for 3D chalcogenide photonic crystal with diamond lattice. The geometrical influence on the photonic bandgap is studied for three dimensional chalcogenide photonic crystal of diamond lattice for both chalcogenide spheres in air and air spheres in chalcogenide background. The air spheres in...

In this paper, a novel design of an all-optical half-adder (HA) based on two two-ring resonators in two-dimensional square-lattice photonic crystal (PC) structure without nonlinear materials is proposed. The HA comprises AND and XOR gates where each gate composed cross-shaped waveguides 2D PC that are filled with silicon (Si) rods silica (SiO2). analyzed simulated using plane-wave expansion (PW...

In this paper, first the limitations of the ray-based method and the one-way wave-field extrapolation migration (WEM) in imaging steeply dipping structures are discussed by some examples. Then a new method of the reverse time migration (RTM), used in imaging such complex structures is presented. The proposed method uses a new wave-field extrapolator called the Leapfrog-Rapid Expansion Method (L...

Three-dimensional dielectric optical crystals with a high index show complete photonic bandgap (PBG), blocking light propagation in all directions. We that this can be used to trap low-index defect cavities, leading strongly enhanced local fields. compute the band structure and optimize of an inverse 3D rod-connected diamond (RCD) structure, using plane-wave expansion (PWE) method. Selecting wi...