786 citations · 5.7k across the 70 of their papers we have counts for
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Third-harmonic generation in photonic topological metasurfaces
Daria Smirnova, Sergey Kruk, Daniel Leykam +3
We study nonlinear effects in two-dimensional photonic metasurfaces supporting topologically-protected helical edge states at the nanoscale. We observe strong third-harmonic genera…
Parity anomaly laser
Daria A. Smirnova, Pramod Padmanabhan, Daniel Leykam
We propose a novel supersymmetry-inspired scheme for achieving robust single mode lasing in arrays of coupled microcavities, based on factorizing a given array Hamiltonian into its…
Valley vortex states and degeneracy lifting via photonic higher-band excitation
Daohong Song, Daniel Leykam, Jing Su +7
We demonstrate valley-dependent vortex generation in a photonic graphene. Without breaking the inversion symmetry, excitation of two equivalent valleys leads to formation of an opt…
Unconventional Flatband Line States in Photonic Lieb Lattices
Shiqi Xia, Ajith Ramachandran, Shiqiang Xia +9
Flatband systems typically host "compact localized states"(CLS) due to destructive interference and macroscopic degeneracy of Bloch wave functions associated with a dispersionless…
Observation of valley Landau-Zener-Bloch oscillations and pseudospin imbalance in photonic graphene
Yong Sun, Daniel Leykam, Stephen Nenni +4
We demonstrate inter-valley Bloch oscillation (BO) and Landau-Zener tunneling (LZT) in an optically-induced honeycomb lattice with a refractive index gradient. Unlike previously ob…
Reconfigurable topological phases in next-nearest-neighbor coupled resonator lattices
Daniel Leykam, S. Mittal, M. Hafezi +1
We present a reconfigurable topological photonic system consisting of a 2D lattice of coupled ring resonators, with two sublattices of site rings coupled by link rings, which can b…