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Trapping light in a Floquet topological photonic insulator by Floquet defect mode resonance
APL Photonics ( IF 5.6 ) Pub Date : 2021-11-01 , DOI: 10.1063/5.0061950 Shirin Afzal 1 , Vien Van 2
APL Photonics ( IF 5.6 ) Pub Date : 2021-11-01 , DOI: 10.1063/5.0061950 Shirin Afzal 1 , Vien Van 2
Affiliation
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.
中文翻译:
通过 Floquet 缺陷模式共振在 Floquet 拓扑光子绝缘体中捕获光
众所周知,以周期性变化的哈密顿量为特征的 Floquet 拓扑光子绝缘体比静态系统表现出更丰富的拓扑行为。在 Floquet 绝缘体中,Floquet-Bloch 模式的相位演变在确定其拓扑行为方面起着至关重要的作用。在这里,我们表明,通过扰动驱动序列,可以在每个演化周期内操纵系统中的循环相变以引起体模式的自干扰,从而导致共振效应,这可以被视为 Floquet静态晶格中缺陷模式共振的对应物。这种 Floquet 缺陷模式共振 (FDMR) 是无腔的,因为它不需要物理边界;相反,它的空间定位模式是 由驱动序列决定,并被发现在拓扑平凡和非平凡格中是不同的。我们在绝缘体上硅上的 Floquet 八边形晶格中展示了边缘模式对 FDMR 的激发,实现了大于 10 的外在质量因子4 . 散射光图案的成像直接揭示了 Floquet 系统的跳跃序列,并证实了 FDMR 在体模式回路中的空间定位。新的 Floquet 拓扑谐振器可以在激光器、光学滤波器和开关、非线性腔光学和量子光学中找到各种应用。
更新日期:2021-11-30
中文翻译:
通过 Floquet 缺陷模式共振在 Floquet 拓扑光子绝缘体中捕获光
众所周知,以周期性变化的哈密顿量为特征的 Floquet 拓扑光子绝缘体比静态系统表现出更丰富的拓扑行为。在 Floquet 绝缘体中,Floquet-Bloch 模式的相位演变在确定其拓扑行为方面起着至关重要的作用。在这里,我们表明,通过扰动驱动序列,可以在每个演化周期内操纵系统中的循环相变以引起体模式的自干扰,从而导致共振效应,这可以被视为 Floquet静态晶格中缺陷模式共振的对应物。这种 Floquet 缺陷模式共振 (FDMR) 是无腔的,因为它不需要物理边界;相反,它的空间定位模式是 由驱动序列决定,并被发现在拓扑平凡和非平凡格中是不同的。我们在绝缘体上硅上的 Floquet 八边形晶格中展示了边缘模式对 FDMR 的激发,实现了大于 10 的外在质量因子4 . 散射光图案的成像直接揭示了 Floquet 系统的跳跃序列,并证实了 FDMR 在体模式回路中的空间定位。新的 Floquet 拓扑谐振器可以在激光器、光学滤波器和开关、非线性腔光学和量子光学中找到各种应用。