Topological One-Way Large-Area Waveguide States in Magnetic Photonic Crystals

Wang, Mudi; Zhang, Ruo-Yang; Zhang, Lei; Wang, Dongyang; Guo, Qinghua; Zhang, Zhao-Qing; Chan, Che Ting

doi:10.1103/physrevlett.126.067401

Cited by 86 publications

(33 citation statements)

References 50 publications

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“…The one-way edge states are confined at the interface between specific topological structures and possess group velocities pointing at only one direction that is determined by the direction of a magnetic field. The commonly used gyromagnetic materials are yttrium-iron-garnet (YIG) (Wang et al, 2008;Lian et al, 2012;Li et al, 2020;Ma et al, 2020;Wang et al, 2021), vanadium-doped calcium-iron-garnet (Shen et al, 2012), and gyroelectric material such as CuFe 2 O 4 (Wu et al, 2018).…”

Section: Theorymentioning

confidence: 99%

“…(B) The Faraday isolator and (C) more compact Voigt isolator (Asadchy et al, 2020). (D) Simulated electric field intensity distributions of the one-way large transport at 11.9 GHz in the heterostructures with a void defect (Wang et al, 2021). (E) Electric field profiles at the frequencies of 4.…”

Section: One-way Optical Waveguidementioning

confidence: 99%

“…In 2021, large-area one-way transport, as shown in Figure 4D, is achieved both theoretically and experimentally by using heterostructures consisting of a domain of an ordinary PhC sandwiched between two domains of gyromagnetic PhCs (Wang et al, 2021). A and C are topological PhCs, whose TRS is broken by applied two opposite biased magnetic fields; B is a trivial PhC sandwiched by A and C, which exhibits one-way transmission robust to imperfections and defects.…”

Section: One-way Optical Waveguidementioning

confidence: 99%

“…The backscattering hinders large-scale optical integration, so resistance to it is the main task (Ma et al, 2011;Kumar and Chaubey, 2012). More interesting physical phenomena and applications of TESs based on the MO effect are explored theoretically and experimentally (Skirlo et al, 2015;Chen et al, 2017;Lu et al, 2018a;Chen et al, 2019a;Chen et al, 2020;Ma et al, 2020;Wang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Magnetic-Optic Effect-Based Topological State: Realization and Application

et al. 2022

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The topological state in photonics was first realized based on the magnetic-optic (MO) effect and developed rapidly in recent years. This review summarizes various topological states. First, the conventional topological chiral edge states, which are accomplished in periodic and aperiodic systems based on the MO effect, are introduced. Some typical novel topological states, including valley-dependent edge states, helical edge states, antichiral edge states, and multimode edge states with large Chern numbers in two-dimensional and Weyl points three-dimensional spaces, have been introduced. The manifest point of these topological states is the wide range of applications in wave propagation and manipulation, to name a few, one-way waveguides, isolator, slow light, and nonreciprocal Goos–Hänchen shift. This review can bring comprehensive physical insights into the topological states based on the MO effect and provides reference mechanisms for light one-way transmission and light control.

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Section: Theorymentioning

confidence: 99%

Section: One-way Optical Waveguidementioning

confidence: 99%

Section: One-way Optical Waveguidementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magnetic-Optic Effect-Based Topological State: Realization and Application

et al. 2022

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“…Inspired from the discovery of condensed quantum Hall effect, many studies have shown that topological states show essentially single-particle behavior of electrons and one can establish an analogy relationship with photon behaviors called topological photonic state (or topological one-way edge state) [4][5][6][7]. Topological one-way edge state provides a powerful platform for novel photonic devices with nontrivial functionalities and excellent performances, such as one-way waveguide [8][9][10][11][12], topological laser [13][14][15][16][17], rainbow trapping phenomenon [18][19][20][21], dispersionless slow light [22][23][24], topological fibre [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Topological One-Way Edge States in an Air-Hole Honeycomb Gyromagnetic Photonic Crystal

et al. 2022

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Topological one-way edge states have attracted increasing attention because of their intriguing fundamental physics and potential applications, particularly in the realm of photonics. In this paper, we present a theoretical and numerical demonstration of topological one-way edge states in an air-hole honeycomb gyromagnetic photonic crystal biased by an external magnetic field. Localized horizontally to the edge and confined in vertical direction by two parallel metallic plates, these unique states possess robust one-way propagation characteristics. They are strongly robust against various types of defects, imperfections and sharp corners on the path, and even can unidirectionally transport along the irregular edges of arbitrary geometries. We further utilize the one-way property of edge states to overcome entirely the issue of back-reflections and show the design of topological leaky wave antennas. Our results open a new door towards the observation of nontrivial edge states in air-hole topological photonic crystal systems, and offer useful prototype of robust topological photonic devices, such as geometry-independent topological energy flux loops and topological leaky wave antennas.

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All‐Optical Digital Logic Based on Unidirectional Modes

Luo

Xiao

et al. 2022

Advanced Optical Materials

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Standard electronic computing based on nanoelectronics and logic gates has upended our lives in a profound way. However, suffering from, both, Moore's law and Joule's law, further development of logic devices based solely on electricity has gradually stuck in the mire. All‐optical logic devices are believed to be a potential solution for such a problem. This work proposes an all‐optical digital logical system (AODLS) based on unidirectional (one‐way propagation) modes in the microwave regime. In a Y‐shaped module of the AODLS, the basic seven logic gates, including OR, AND, NOT, NOR, NAND, XOR, and XNOR gates, are achieved for continuous broadband operation relying on the existence of unidirectional electromagnetic signals. Extremely large extinction and contrast ratios are found in these logic gates. The idea of “negative logic” is used in designing the AODLS. Moreover, the authors further demonstrate that the AODLS can be assembled to multi‐input and/or multi‐output logical functionalities, which is promising for parallel computation. Besides, numerical simulations perfectly fit with and corroborate the theoretical analyses presented here. The low‐loss, broadband, and robust characteristics of this system are outlined and studied in some detail. The AODLS consisting of unidirectional structures may open a new route for all‐optical calculation and integrated optical circuits.

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Topological One-Way Large-Area Waveguide States in Magnetic Photonic Crystals

Cited by 86 publications

References 50 publications

Magnetic-Optic Effect-Based Topological State: Realization and Application

Magnetic-Optic Effect-Based Topological State: Realization and Application

Topological One-Way Edge States in an Air-Hole Honeycomb Gyromagnetic Photonic Crystal

All‐Optical Digital Logic Based on Unidirectional Modes

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