Fabrication and Properties of an Anisotropic TiO₂Dielectric Composite

Abstract

Thermoplastic co‐extrusion was employed to fabricate an anisotropic dielectric composite based on titanium dioxide with a microcellular architecture with 50 μm macropore channels aligned to create unidirectional porosity. The resulting channeled structure exhibits artificial anisotropic dielectric properties, with the dielectric relative permittivity being 9.6 transverse to the channels and 90 in the longitudinal direction.

Unified homogenization of photonic/phononic crystals with first-band negative refraction

“…We consider a simple two-phase photonic crystal that consists of a homogeneous anisotropic dielectric matrix containing 1.5mm holes, periodically spaced 4mm apart in both the x 1 -and x 2 -directions. Using thermoplastic co-extrusion fabrication or other methods, low-loss dielectric composites of various degrees of anisotropy can be fabricated; see, e.g., (Zhang et al 2008), (Wing et al 2006). Here, for illustration, we use a matrix with dielectric constants of M I = 9.6 and M II = 90, where the superimposed M denotes the matrix dielectric tensor.…”