6533b81ffe1ef96bd1276f67
RESEARCH PRODUCT
Self-assembled three-dimensional inverted photonic crystals on a photonic chip
Jouni AhopeltoMarkku KapulainenGudrun Kocher-oberlehrerGudrun Kocher-oberlehrerDavid CassagneWorawut KhunsinWorawut KhunsinClivia M. Sotomayor TorresTimo AaltoRudolf ZentelSanna ArpiainenJames DekkerM. MulotKevin Vyncksubject
Materials scienceFabricationSiliconPhysics::Opticschemistry.chemical_element02 engineering and technology01 natural scienceslaw.invention010309 opticsOpticslaw0103 physical sciencesMaterials ChemistryElectrical and Electronic EngineeringElectronic band structurePhotonic crystalbusiness.industryPhotonic integrated circuitSurfaces and Interfaces021001 nanoscience & nanotechnologyCondensed Matter PhysicsYablonoviteSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialschemistryOptoelectronicsPhotonics0210 nano-technologybusinessWaveguidedescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-06-05 | physica status solidi (a) |