Measuring topological invariants from generalized edge states in polaritonic quasicrystals

  title={Measuring topological invariants from generalized edge states in polaritonic quasicrystals},
  author={F. Baboux and E. Levy and A. Lema{\^i}tre and C. G{\'o}mez and E. Galopin and L. Gratiet and I. Sagnes and A. Amo and J. Bloch and E. Akkermans},
  journal={Physical Review B},
  • F. Baboux, E. Levy, +7 authors E. Akkermans
  • Published 2017
  • Physics
  • Physical Review B
  • We investigate the topological properties of Fibonacci quasicrystals using cavity polaritons. Composite structures made of the concatenation of two Fibonacci sequences allow one to investigate generalized edge states forming in the gaps of the fractal energy spectrum. We employ these generalized edge states to determine the topological invariants of the quasicrystal. When varying a structural degree of freedom (phason) of the Fibonacci sequence, the edge states spectrally traverse the gaps… CONTINUE READING
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