Abstract

Floquet topological insulators (FTIs) have been used to study the topological features of a dynamic quantum system within the band structure. However, it is difficult to directly observe the dynamic modulation of band structures in FTIs. Here, we implement the dynamic Su–Schrieffer–Heeger model in periodically curved waveguides to explore new behaviors in FTIs using light field evolutions. Changing the driving frequency produces near-field evolutions of light in the high-frequency curved waveguide array that are equivalent to the behaviors in straight arrays. Furthermore, at modest driving frequencies, the field evolutions in the system show boundary propagation, which are related to topological edge modes. Finally, we believe curved waveguides enable profound possibilities for the further development of Floquet engineering in periodically driven systems, which ranges from condensed matter physics to photonics.

© 2021 Chinese Laser Press

Engineering zero modes, Fano resonance, and Tamm surface states in the waveguide-array realization of the modified Su-Schrieffer-Heeger model

Ying Yang and Yiming Pan
Opt. Express 27(23) 32900-32911 (2019)

Topological phase-dependent thermalization dynamics in radiative heat transfer: insights from a one-dimensional Su-Schrieffer-Heeger model

Farzam Bahmani and Moladad Nikbakht
Opt. Express 32(2) 1257-1274 (2024)

Topological laser with higher-order corner states in the 2-dimensional Su-Schrieffer-Heeger model

Mei-Song Wei, Ming-Jie Liao, Ce Wang, Chengjie Zhu, Yaping Yang, and Jingping Xu
Opt. Express 31(3) 3427-3440 (2023)

Photonic two-particle quantum walks in Su–Schrieffer–Heeger lattices

Friederike Klauck, Matthias Heinrich, and Alexander Szameit
Photon. Res. 9(1) A1-A7 (2021)

Flexible light manipulation in non-Hermitian frequency Su–Schrieffer–Heeger lattice

Yiling Song, Yuelan Chen, Wei Xiong, and Mingfeng Wang
Opt. Lett. 47(7) 1646-1649 (2022)