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21 papers · 2 filters
Bulk-edge correspondence and trapping at a non-Hermitian topological interface
Stefano Longhi
In Hermitian systems, according to the bulk-edge correspondence interfacing two topological optical media with different bulk topological numbers implies the existence of edge stat…
All-optical polarization and amplitude modulation of second-harmonic generation in atomically thin semiconductors
Sebastian Klimmer, Omid Ghaebi, Ziyang Gan +4
Second-harmonic generation is of paramount importance in several fields of science and technology, including frequency conversion, self-referencing of frequency combs, nonlinear sp…
Femtosecond phononic coupling to both spins and charges in a room temperature antiferromagnetic semiconductor
D. Bossini, S. dal Conte, M. Terschanski +7
Spintronics is postulated on the possibility to employ the magnetic degree of freedom of electrons for computation and couple it to charges. In this view, the combination of the hi…
Experimentally Detecting Quantized Zak Phases without Chiral Symmetry in Photonic Lattices
Zhi-Qiang Jiao, Stefano Longhi, Xiao-Wei Wang +8
Symmetries play a major role in identifying topological phases of matter and in establishing a direct connection between protected edge states and topological bulk invariants via t…
Non-Hermitian topological phase transitions in superlattices and the optical Dirac equation
Stefano Longhi
Optical superlattices with sublattice symmetry subjected to a synthetic imaginary gauge field undergo a topological phase transition in the Bloch energy spectrum, characterized by…
Near-field Hyperspectral Imaging of Resonant Mie Modes in a Dielectric Island
Nicoletta Granchi, Michele Montanari, Andrea Ristori +8
All-dielectric, sub-micrometric particles have been successfully exploited for light management in a plethora of applications at visible and near-infrared frequency. However, the i…