Abstract
A calculation of band structure is carried out and demonstrates that a hollow spherical non-closed-packed face-centered cubic uniaxial structure possesses a robust complete photonic band gap between the low-frequency bands (2nd and 3rd bands). The results show that the relative gap size can reach a value of 6.1% at a low dielectric contrast of 7.84 appropriate to the transparent TiO 2 . The influence of structure variations on the band gap, such as hollow spheres, cylindrical tubes and dielectric contrast, is also discussed.
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