Design of Photonic Topological Insulators Using Density Based Topology Optimization

Rasmus E. Christiansen*, Fengwen Wang, Ole Sigmund, Søren Stobbe

*Corresponding author for this work

    Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

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    Abstract

    We provide a novel photonic topological insulator design (PTI) exhibiting the quantum-spin-Hall effect, which, as opposed to previous designs, is conceived using numerical optimization of the transmission through PTI edge states. Specifically, we use topology optimization to maximize the transmission of light through a carefully configured model domain composed of two photonic crystal phases. This leads to a numerically generated PTI, which features larger bandgaps than previously predicted for planar PTIs and excellent suppression of backscattering from sharp bends.
    Original languageEnglish
    Publication date2019
    Number of pages2
    Publication statusPublished - 2019
    Event10th International Conference on Metamaterials, Photonic Crystals and Plasmonics - Instituto Superior Técnico, Lisbon, Portugal
    Duration: 23 Jul 201926 Jul 2019

    Conference

    Conference10th International Conference on Metamaterials, Photonic Crystals and Plasmonics
    LocationInstituto Superior Técnico
    Country/TerritoryPortugal
    CityLisbon
    Period23/07/201926/07/2019

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