Probing topological phases in waveguide superlattices

One-dimensional superlattices with modulated coupling constants show rich topological properties and tunable edge states. Beyond the dimeric case, probing the topological properties of superlattices is a challenge. Here we suggest a rather general method of bulk probing topological invariants in ...

Source: Optics Letters - May 9, 2019 Category: Physics Authors: Stefano Longhi Source Type: research