Modification of photonic crystals for obtaining common band gaps for TE and TM waves

The band gaps of the two-dimensional photonic crystals, created by inhomogeneous triangular photonic crystal of variable central hexagonal holes are derived. The structure is made of air holes in GaAs. We present the best absolute photonic band gap for this structure by changing the holes’ radii. The photonic band gaps are calculated by the plane wave expansion method. The results indicate 95% overlap in the band gaps of both polarizations of TE and TM in triangular lattice.

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Complete photonic band gaps in Sn2P2X6 (X = S, Se) supercell photonic crystals

Ferroelectrics ◽

10.1080/00150193.2020.1713353 ◽

2020 ◽

Vol 557 (1) ◽

pp. 92-97

Author(s):

Sevket Simsek ◽

Selami Palaz ◽

Husnu Koc ◽

Amirullah M. Mamedov ◽

Ekmel Ozbay

Keyword(s):

Optical Properties ◽

Finite Difference ◽

Maxwell Equations ◽

Expansion Method ◽

Band Gaps ◽

Plane Wave Expansion ◽

Photonic Band Gaps ◽

Plane Wave Expansion Method ◽

Difference Time ◽

Photonic Band

In this work, we present an investigation of the optical properties and band structures for the photonic crystal structures (PCs) based on Sn2P2X6: X = S, Se) with Fibonacci superlattices. The optical properties of PCs can be tuned by varying structure parameters such as the lengths of poled domains, filling factor, and dispersion relation. In our simulation, we employed the finite-difference time domain technique and the plane wave expansion method, which implies the solution of Maxwell equations with centered finite-difference expressions for the space and time derivatives.

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PHOTONIC GAPS IN PERIODIC DIELECTRIC STRUCTURES

Modern Physics Letters B ◽

10.1142/s021798499200017x ◽

1992 ◽

Vol 06 (03) ◽

pp. 139-144 ◽

Cited By ~ 7

Author(s):

C.T. CHAN ◽

K.M. HO ◽

C.M. SOUKOULIS

Keyword(s):

Plane Wave ◽

Electromagnetic Waves ◽

Expansion Method ◽

Dielectric Materials ◽

Band Gaps ◽

Plane Wave Expansion ◽

Photonic Band Gaps ◽

Plane Wave Expansion Method ◽

Dielectric Structures ◽

Photonic Band

Using a plane wave expansion method, we solved the Maxwell’s equations for the propagation of electromagnetic waves inside periodic dielectric materials, and found the existence of photonic band gaps in several classes of periodic dielectric structures.

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STUDY OF BAND STRUCTURE OF TWO-DIMENSIONAL ANISOTROPIC HONEYCOMB PHOTONIC CRYSTALS

Modern Physics Letters B ◽

10.1142/s0217984913501819 ◽

2013 ◽

Vol 27 (25) ◽

pp. 1350181 ◽

Cited By ~ 2

Author(s):

A. SEDGHI ◽

A. ROUNAGHI SOUFIANI

Keyword(s):

Photonic Crystals ◽

Band Structure ◽

Expansion Method ◽

Point Of View ◽

Band Gaps ◽

Honeycomb Lattice ◽

Two Dimensional ◽

Plane Wave Expansion ◽

Plane Wave Expansion Method ◽

Practical Point

Using the plane wave expansion method, we have calculated, for both E and H polarizations, the band structure of 2D anisotropic photonic crystals with honeycomb lattice composed of anisotropic tellurium ( Te ) rods embedded in air background. The two rods in the unit cell are chosen square and circular in shape. Here, from a practical point of view, in order to obtain maximum band gaps, we have also studied the band structure as a function of size of rods.

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