TY - JOUR
T1 - Broadband Topological Slow Light through Higher Momentum-Space Winding
AU - Guglielmon, Jonathan
AU - Rechtsman, Mikael C.
N1 - Publisher Copyright:
© 2019 American Physical Society.
PY - 2019/4/18
Y1 - 2019/4/18
N2 - Slow-light waveguides can strongly enhance light-matter interaction, but suffer from a narrow bandwidth, increased backscattering, and Anderson localization. Edge states in photonic topological insulators resist backscattering and localization, but typically cross the bulk band gap over a single Brillouin zone, meaning that slow group velocity implies narrow-band operation. Here we show theoretically that this can be circumvented via an edge termination that causes the edge state to wind many times around the Brillouin zone, making it both slow and broadband.
AB - Slow-light waveguides can strongly enhance light-matter interaction, but suffer from a narrow bandwidth, increased backscattering, and Anderson localization. Edge states in photonic topological insulators resist backscattering and localization, but typically cross the bulk band gap over a single Brillouin zone, meaning that slow group velocity implies narrow-band operation. Here we show theoretically that this can be circumvented via an edge termination that causes the edge state to wind many times around the Brillouin zone, making it both slow and broadband.
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U2 - 10.1103/PhysRevLett.122.153904
DO - 10.1103/PhysRevLett.122.153904
M3 - Article
C2 - 31050507
AN - SCOPUS:85064814199
SN - 0031-9007
VL - 122
JO - Physical review letters
JF - Physical review letters
IS - 15
M1 - 153904
ER -