Tilted Dirac cones and asymmetric conical diffraction in photonic Lieb-kagome lattices
Jean-Philippe Lang,
Haissam Hanafi,
Jörg Imbrock
et al.
Abstract:The Lieb lattice and the kagome lattice, which are both well known for their Dirac cones and flat bands, can be continuously converted into each other by a shearing transformation. During this transformation, the flat band is destroyed, but the Dirac cones remain and become tilted, with types I, II, and III occurring for different parameters. In this work, we first study these tilted Dirac cones using a tight-binding model, revealing how they can be engineered into the different types. We then demonstrate coni… Show more
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