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

    Research output: Contribution to journalArticleScientificpeer-review

    Abstract

    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 1.55µm. 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
    Volume214
    Issue number9
    Early online date2017
    DOIs
    Publication statusPublished - 1 Sep 2017
    MoE publication typeA1 Journal article-refereed

    Keywords

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

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