Trapping light in a Floquet topological photonic insulator by Floquet defect mode resonance

Floquet topological photonic insulators characterized by periodically varying Hamiltonians are known to exhibit much richer topological behaviors than static systems. In a Floquet insulator, the phase evolution of the Floquet–Bloch modes plays a crucial role in determining its topological behaviors....

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Autores principales: Shirin Afzal, Vien Van
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Lenguaje:EN
Publicado: AIP Publishing LLC 2021
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spelling oai:doaj.org-article:e9a95d006e174d1998035fdd42cf82662021-12-01T18:51:31ZTrapping light in a Floquet topological photonic insulator by Floquet defect mode resonance2378-096710.1063/5.0061950https://doaj.org/article/e9a95d006e174d1998035fdd42cf82662021-11-01T00:00:00Zhttp://dx.doi.org/10.1063/5.0061950https://doaj.org/toc/2378-0967Floquet topological photonic insulators characterized by periodically varying Hamiltonians are known to exhibit much richer topological behaviors than static systems. In a Floquet insulator, the phase evolution of the Floquet–Bloch modes plays a crucial role in determining its topological behaviors. Here, we show that by perturbing the driving sequence, it is possible to manipulate the cyclic phase change in the system over each evolution period to induce self-interference of a bulk mode, leading to a resonance effect, which can be regarded as a Floquet counterpart of defect-mode resonance in static lattices. This Floquet Defect Mode Resonance (FDMR) is cavity-less since it does not require physical boundaries; its spatial localization pattern is, instead, determined by the driving sequence and is found to be different in topologically trivial and nontrivial lattices. We demonstrated excitation of FDMRs by edge modes in a Floquet octagon lattice on silicon-on-insulator, achieving extrinsic quality factors greater than 104. Imaging of the scattered light pattern directly revealed the hopping sequence of the Floquet system and confirmed the spatial localization of FDMR in a bulk-mode loop. The new Floquet topological resonator could find various applications in lasers, optical filters and switches, nonlinear cavity optics, and quantum optics.Shirin AfzalVien VanAIP Publishing LLCarticleApplied optics. PhotonicsTA1501-1820ENAPL Photonics, Vol 6, Iss 11, Pp 116101-116101-9 (2021)
institution DOAJ
collection DOAJ
language EN
topic Applied optics. Photonics
TA1501-1820
spellingShingle Applied optics. Photonics
TA1501-1820
Shirin Afzal
Vien Van
Trapping light in a Floquet topological photonic insulator by Floquet defect mode resonance
description Floquet topological photonic insulators characterized by periodically varying Hamiltonians are known to exhibit much richer topological behaviors than static systems. In a Floquet insulator, the phase evolution of the Floquet–Bloch modes plays a crucial role in determining its topological behaviors. Here, we show that by perturbing the driving sequence, it is possible to manipulate the cyclic phase change in the system over each evolution period to induce self-interference of a bulk mode, leading to a resonance effect, which can be regarded as a Floquet counterpart of defect-mode resonance in static lattices. This Floquet Defect Mode Resonance (FDMR) is cavity-less since it does not require physical boundaries; its spatial localization pattern is, instead, determined by the driving sequence and is found to be different in topologically trivial and nontrivial lattices. We demonstrated excitation of FDMRs by edge modes in a Floquet octagon lattice on silicon-on-insulator, achieving extrinsic quality factors greater than 104. Imaging of the scattered light pattern directly revealed the hopping sequence of the Floquet system and confirmed the spatial localization of FDMR in a bulk-mode loop. The new Floquet topological resonator could find various applications in lasers, optical filters and switches, nonlinear cavity optics, and quantum optics.
format article
author Shirin Afzal
Vien Van
author_facet Shirin Afzal
Vien Van
author_sort Shirin Afzal
title Trapping light in a Floquet topological photonic insulator by Floquet defect mode resonance
title_short Trapping light in a Floquet topological photonic insulator by Floquet defect mode resonance
title_full Trapping light in a Floquet topological photonic insulator by Floquet defect mode resonance
title_fullStr Trapping light in a Floquet topological photonic insulator by Floquet defect mode resonance
title_full_unstemmed Trapping light in a Floquet topological photonic insulator by Floquet defect mode resonance
title_sort trapping light in a floquet topological photonic insulator by floquet defect mode resonance
publisher AIP Publishing LLC
publishDate 2021
url https://doaj.org/article/e9a95d006e174d1998035fdd42cf8266
work_keys_str_mv AT shirinafzal trappinglightinafloquettopologicalphotonicinsulatorbyfloquetdefectmoderesonance
AT vienvan trappinglightinafloquettopologicalphotonicinsulatorbyfloquetdefectmoderesonance
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