Slow light topological photonics with counter-propagating waves and its active control on a chip.

ABSTRACT: Topological slow light exhibits potential to achieve stopped light by virtue of its widely known robust and non-reciprocal behaviours. Conventional approach for achieving topological slow light often involves flat-band engineering without disentangling the underlying physical mechanism. Here, we unveil the presence of counter-propagating waves within valley kink states as the distinctive hallmark of the slow light topological photonic waveguides. These counter-propagating waves, supported by topological vortices along glide-symmetric interface, provide significant flexibility for controlling the slowness of light. We tune the group velocity of light by changing the spatial separation between vortices adjacent to the glide-symmetric interface. We also dynamically control the group delay by

SUBMITTER: Kumar A 

PROVIDER: S-EPMC10830473 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature