Prototyping of Epoxy/ceramic Photonic Crystals by Stereolithography.

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  • 光造形法による高分子／セラミック系フォトニック結晶の試作
  • ヒカリ ゾウケイホウ ニ ヨル コウブンシ セラミックケイ フォトニック ケッショウ ノ シサク

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Three-dimensional photonic crystals with periodic variations in dielectric constant were fabricated by a stereolithographic method of rapid prototyping. The structures were composed of millimeter-order epoxy lattices and designed to exhibit forbidden bands of GHz radio frequencies in millimeter-wave range. To increase dielectric constants of the lattices for wider forbidden bands, silica ceramic particles were dispersed into the epoxy. The attenuation of transmission amplitude through the photonic crystals, which was measured as a function of frequency by using network analyzer, showed the formation of forbidden gaps in millimeter-wave ranges. These photonic crystals are expected to apply for high performance directional antennas and barriers against electromagnetic interference.

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