TY  - JOUR
A1  - Fritsche, Alexander
A1  - Höckendorf, Bastian
A1  - Alvermann, Andreas
A1  - Fehske, Holger
T1  - Real and imaginary edge states in stacked Floquet honeycomb lattices
JF  - The European Physical Journal B
N2  - We present a non-Hermitian Floquet model with topological edge states in real and imaginaryband gaps. The model utilizes two stacked honeycomb lattices which can be related via four different typesof non-Hermitian time-reversal symmetry. Implementing the correct time-reversal symmetry provides uswith either two counterpropagating edge states in a real gap, or a single edge state in an imaginary gap.The counterpropagating edge states allow for either helical or chiral transport along the lattice perimeter.In stark contrast, we find that the edge state in the imaginary gap does not propagate. Instead, it remainsspatially localized while its amplitude continuously increases. Our model is well-suited for realizing theseedge states in photonic waveguide lattices
KW  - edge states
KW  - lattices
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-232347
SN  - 1434-6028
VL  - 93
IS  - 151
ER  -