Large absolute and polarization-independent photonic band gaps for various lattice structures and rod shapes

Abstract

Articles you may be interested inMaximum and overlapped photonic band gaps in both transverse electric and transverse magnetic polarizations in two-dimensional photonic crystals with low symmetry

All-angle left-handed negative refraction in Kagomé and honeycomb lattice photonic crystals

“…Mostly the properties of lattices with square and hexagonal symmetry have been calculated [1][2][3] and have been used in the negative refraction experiments [4][5][6][7][8][9]. Derived structures have been studied together with the basic geometries.…”

Variation of group velocity and complete bandgaps in two-dimensional photonic crystals with drilling holes into the dielectric rods

“…It was reported that the symmetry reduction of atom configuration by introducing a two-point basis set in simple 2D lattice can remarkably increase complete PBG [15], quite similar to the 3D case for diamond structure [16]. In contrast, symmetry breaking in a square lattice by changing the shape of square air rods to rectangular [17] or cylinder [18] reduces the width of complete PBGs.…”

“…Various methods for creating large PBGs or in increasing an existing PBG by altering the dielectric constant ðrÞ within a unit cell, have been proposed. These methods include rotating the lattices [6], using anisotropic dielectric materials [7], rotating the noncircular rods [8][9][10], and modifying the permittivity distribution in a unit cell [11][12][13]. In such cases, an EM wave can be decomposed into the E-and Hpolarization modes for two-dimensional (2D) photonic crystal.…”

Optimal tunability of waveguides based on silicon photonic crystals infiltrated with liquid crystals

“…1a consisting of a two dimensional silicon photonic crystal with a triangular lattice of circular holes with radius R and lattice constant a, where a line of holes in the direction -K has a different radius R de f and is infiltrated by E7 liquid crystal. The triangular structure has a larger photonic band gap (PBG) for TE modes than other geometries such as square, honeycomb, kagome,… (Susa 2002), for the same refractive index contrast.…”