Microwave applications of photonic topological insulators

Ma, Shukai; Anlage, Steven M.

doi:10.1063/5.0008046

Cited by 39 publications

(23 citation statements)

References 65 publications

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“…A variety of defect waveguides can be realized by changing the atom properties [28]. Recent photonic topological insulator studies present an alternative form of PC waveguide using the interface between two different topological domains [30][31][32][33][34]. Bulk PC systems have also been employed to construct chaotic billiard systems [12,35].…”

Section: Photonic Crystal Graphmentioning

confidence: 99%

Eigenfunction and eigenmode-spacing statistics in chaotic photonic crystal graphs

Ma¹,

Antonsen²,

Ott³

et al. 2021

Preprint

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The statistical properties of wave chaotic systems of varying dimensionalities and realizations have been studied extensively. These systems are commonly characterized by the statistics of the short-range and long-range eigenmode-spacing, and the one-point and two-point eigenfunction correlations. Here, we propose photonic crystal (PC) defect waveguide graphs as an alternative physical system for chaotic graph studies. Photonic crystal graphs have two novel features, namely an unusual dispersion relation for the propagating modes, and complex scattering properties of the junctions and bends. Recent studies reveal that chaotic graphs possess non-universal properties, which may be better analyzed and understood through eigenfunction analysis. Here we present numerically determined properties of an ensemble of such PC-graphs including both eigenfunction amplitude and eigenmode-spacing studies. Our proposed system is amenable to other statistical studies, and may be realized experimentally.

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Section: Photonic Crystal Graphmentioning

confidence: 99%

Eigenfunction and eigenmode-spacing statistics in chaotic photonic crystal graphs

Ma¹,

Antonsen²,

Ott³

et al. 2021

Preprint

Self Cite

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“…Recently, waves with high robustness against defects have attracted immense attention. , A recent development of these robust structures are photonic topological insulators (PTIs). , Drawn from analogies to their electronic counterparts, PTIs exploit properties of the global topology of their photonic band structure to effectively eliminate backscattering under a wide range of deformations and defects. , PTIs are characterized by a topological invariant defined on the global Brillouin zone (BZ) , or a restricted BZ in valley PTIs at optical , and microwave bands. , Furthermore, it has recently been found that PTIs can even exist in different amorphous systems, such as deformed valley PTIs, amorphous hopping models, amorphous gyroscope-and-spring networks, and disordered Chern PTIs …”

Section: Introductionmentioning

confidence: 99%

Line Waves Existing at Junctions of Dual-Impedance Metasurfaces

Chang

Fang

et al. 2021

ACS Photonics

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Line waves (LWs) are special electromagnetic modes supported on junctions of different metasurfaces that enforce a duality condition, such as capacitive and inductive metasurfaces. These edge modes are tightly confined to the interface and can propagate along arbitrary one-dimensional paths with high efficiency. Such attractive characteristics show potential applications for robust waveguides. Here, we introduce a compact dual-impedance metasurface platform to explore the properties of LWs. We explore intrinsic properties of LWs including dispersion, confinement, and spin-momentum locking. It is found that broadband LWs can be supported by metasurfaces with varied surface wave momentum, and the dispersion of LWs can be tailored by tuning either their capacitive or inductive properties. The equivalent impedances of metasurfaces are extracted to establish a simplified semianalytical model to study their spin-momentum locking properties. Unidirectional propagation can be excited via a chiral point source placed near the junction. We further implement a parallel plate waveguide consisting of four metasurfaces arranged with a duality symmetry. Experiments validate the analysis and indicate the existence of highly robust transmissions even when the waveguide is longitudinally warped, providing an enticing option for applying LWs in the field of wearable wireless channels and flexible electronics.

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“…These TREK states are associated with conserved DoFs and do not suffer from back-scattering. Not surprisingly, advances in topological photonics have already contributed to conceptual developments in numerous photonic components and devices 29 , including waveguides 26 , cavities [30][31][32][33] , and lasers [34][35][36] . Here we utilize the ideas from topological photonics to develop a new approach to mode-selective excitation of multi-mode robust waveguides by single (point-like) emitters.…”

Section: Introductionmentioning

confidence: 99%

Mode-selective Single-dipole Excitation and Controlled Routing of Guided Waves in a Multi-mode Topological Waveguide

Li,

Yu,

Lai

et al. 2021

Preprint

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Microwave applications of photonic topological insulators

Cited by 39 publications

References 65 publications

Eigenfunction and eigenmode-spacing statistics in chaotic photonic crystal graphs

Eigenfunction and eigenmode-spacing statistics in chaotic photonic crystal graphs

Line Waves Existing at Junctions of Dual-Impedance Metasurfaces

Mode-selective Single-dipole Excitation and Controlled Routing of Guided Waves in a Multi-mode Topological Waveguide

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