A Germanium inverse woodpile structure with a large photonic band gap

Florencio García-Santamaría, Mingjie Xu, Virginie Lousse, Shanhui Fan, Paul V. Braun, Jennifer A. Lewis

Research output: Contribution to journalArticlepeer-review


The first realization and characterization of a Ge inverse woodpile structure with a theoretical PBG width as large as 25 % was reported. To create a Ge inverse woodpile structure with the theoretical photonic properties, a polymer scaffold was produced by using direct-write assembly of a concentrated polyelectrolyte ink. A homogeneous fluidic ink (40 wt % polyelectrolyte in aqueous solution) was deposited into an alcohol-rich reservoir to produce a cylindrical filament approximately 1μm in diameter that is patterned in a layer-build sequence. Optical characterization was performed at each step of the fabrication process to characterize the optical response of the Ge inverse woodpile photonic crystals, and relate it to the properties of the initial polymer template. Combining simulation and experiment, a new route for creating three-dimensional complete bandgap photonic crystals at IR wavelengths was demonstrated.

Original languageEnglish (US)
Pages (from-to)1567-1570
Number of pages4
JournalAdvanced Materials
Issue number12
StatePublished - Jun 18 2007

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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