Topological pumping over a photonic Fibonacci quasicrystal

Mor Verbin, Oded Zilberberg, Yoav Lahini, Yaacov E. Kraus, Yaron Silberberg
2015 Physical Review B  
Quasiperiodic lattices have recently been shown to be a non-trivial topological phase of matter. Charge pumping -- one of the hallmarks of topological states of matter -- was recently realized for photons in a one-dimensional (1D) off-diagonal Harper model implemented in a photonic waveguide array. The topologically nontrivial 1D Fibonacci quasicrystal (QC) is expected to facilitate a similar phenomenon, but its discrete nature and lack of pumping parameter hinder the experimental study of such
more » ... ental study of such topological effects. In this work we overcome these obstacles by utilizing a family of topologically equivalent QCs which ranges from the Fibonacci QC to the Harper model. Implemented in photonic waveguide arrays, we observe the topological properties of this family, and perform a topological pumping of photons across a Fibonacci QC.
doi:10.1103/physrevb.91.064201 fatcat:uvz43se5tjcdriyrojea7iu2pi