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Chiral excitation and effective bandwidth enhancement in tilted coupled optical waveguide lattices
Stefano Longhi
Light escape from an optical waveguide side-coupled to a waveguide lattice provides a photonic analogue of the spontaneous emission process of an excited two-level atom in a one-di…
Unraveling the Non-Hermitian Skin Effect in Dissipative Systems
Stefano Longhi
The non-Hermitian skin effect, i.e. eigenstate condensation at the edges in lattices with open boundaries, is an exotic manifestation of non-Hermitian systems. In Bloch theory, an…
Superradiance paradox in waveguide lattices
Stefano Longhi
Recently, it has been suggested that the collective radiative decay of two point-like quantum emitters coupled to a waveguide, separated by a distance comparable to the coherence l…
Photonic simulation of giant atom decay
Stefano Longhi
Spontaneous emission of an excited atom in a featureless continuum of electromagnetic modes is a fundamental process in quantum electrodynamics associated with an exponential decay…
Topological Anderson phase in quasi-periodic waveguide lattices
Stefano Longhi
The topological trivial band of a lattice can be driven into a topological phase by disorder in the system. This so-called topological Anderson phase has been predicted and observe…
Stochastic non-Hermitian skin effect
Stefano Longhi
A hallmark of photonic transport in non-Hermitian lattices with asymmetric hopping is the robust unidirectional flow of light, which is responsible for important phenomena such as…