Self-assembled three-dimensional inverted photonic crystals on a photonic chip

Sanna Arpiainen*, Kevin Vynck, James Dekker, Markku Kapulainen, Worawut Khunsin, Timo Aalto, Mikael Mulot, Gudrun Kocher-Oberlehrer, Rudolf Zentel, Clivia M.Sotomayor Torres, David Cassagne, Jouni Ahopelto

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Three dimensional photonic crystals (PhCs) exhibiting a full photonic band gap have high potential in optical signal processing and detector applications. However, the challenges in the integration of the 3D PhCs into photonic circuits have so far hindered their exploitation in real devices. This article demonstrates the fabrication of 3D PhCs exploiting the capillary directed self-assembly (CDSA) of monodisperse colloidal silica spheres, their inversion to silicon shells, and integration with silicon waveguides. The measured transmission characteristics agree with numerical predictions and provide strong indication of a full photonic band gap in the inverted 3D photonic crystals at wavelengths close to 1.55 μm. Silicon inverted photonic crystal self-assembled into a cavity in a waveguide intersection and the corresponding photonic band structure of the crystal, together with the simulated transmission, reflection, and absorption spectra.

Original languageEnglish
Article number1700039
JournalPhysica Status Solidi (A) Applications and Materials Science
Issue number9
Early online date5 Jun 2017
Publication statusPublished - Sept 2017


  • integration
  • inverted opals
  • photonic band gap
  • photonic crystals
  • waveguides

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Electrical and Electronic Engineering


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