Open AccessNon-close-packed photonic crystal of TiO2 hollow spheres: Fabrication and photonic bandgap calculation
Author(s) -
Zhu Yong-Zheng,
Yin Ji-Qiu,
Minghui Qiu
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.7725
Subject(s) - photonic crystal , materials science , plane wave expansion method , photonics , fabrication , brillouin zone , spheres , yablonovite , etching (microfabrication) , scanning electron microscope , band gap , optoelectronics , optics , photonic integrated circuit , nanotechnology , composite material , medicine , alternative medicine , physics , pathology , astronomy , layer (electronics)
We have fabricated the non-close-packed photonic crystals of SiO2 microspheres with the help of the modified vertical method, the thermal sintering technology and etching. The face-centered cubic photonic crystals of TiO2 hollow spheres connected by TiO2 cylindrical tubes have been fabricated using silica template. The structure of the non-close-packed opals was characterized by scanning electron microscopy. We performed photonic band-structure calculations of this structure by a plane wave expansion method. The calculations indicate that the photonic bandgaps at all points of the Brillouin zone in non-close-packed structure were opened except point W.