786 citations · 5.7k across the 70 of their papers we have counts for
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Experimental observation of optical Weyl points
Jiho Noh, Sheng Huang, Daniel Leykam +3
Weyl fermions are hypothetical two-component massless relativistic particles in three-dimensional (3D) space, proposed by Hermann Weyl in 1929. Their band-crossing points, called '…
Edge Modes, Degeneracies, and Topological Numbers in Non-Hermitian Systems
Daniel Leykam, Konstantin Y. Bliokh, Chunli Huang +2
We analyze chiral topological edge modes in a non-Hermitian variant of the 2D Dirac equation. Such modes appear at interfaces between media with different "masses" and/or signs of…
Edge Solitons in Nonlinear Photonic Topological Insulators
Daniel Leykam, Y. D. Chong
We show theoretically that a photonic topological insulator can support edge solitons that are strongly self-localized and propagate unidirectionally along the lattice edge. The ph…
Conical intersections for light and matter waves
Daniel Leykam, Anton S. Desyatnikov
We review the design, theory, and applications of two dimensional periodic lattices hosting conical intersections in their energy-momentum spectrum. The best known example is the D…
Localization of weakly disordered flat band states
Daniel Leykam, Joshua D. Bodyfelt, Anton S. Desyatnikov +1
Certain tight binding lattices host macroscopically degenerate flat spectral bands. Their origin is rooted in local symmetries of the lattice, with destructive interference leading…
Anomalous Topological Phases and Unpaired Dirac Cones in Photonic Floquet Topological Insulators
Daniel Leykam, M. C. Rechtsman, Y. D. Chong
We propose a class of photonic Floquet topological insulators based on staggered helical lattices and an efficient numerical method for calculating their Floquet bandstructure. The…