Valley Hall edge solitons in honeycomb lattice with an armchair-type domain wall

Tang, Qian; Belić, Milivoj R.; Zhang, Yi Qi; Zhang, Yan Peng; Li, Yong Dong

doi:10.1007/s11071-021-07193-6

Cited by 4 publications

(1 citation statement)

References 74 publications

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“…[11,12] However, there is no edge state for armchair boundary unless defects exist or lattice symmetry breaking occurs. [9,[13][14][15] As a magnetic field is applied to a graphene-like system, gapless edge states can be constructed on armchair boundaries, and a series of dispersionless bands emerge corresponding to the Landau levels. [16] Recently, a completely new boundary named "twig" has been proposed to realize the localization of light.…”

Section: Introductionmentioning

confidence: 99%

Topological States Decorated by Twig Boundary in Plasma Photonic Crystals

Li,

Yao,

Wang

et al. 2024

Advanced Optical Materials

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The twig edge states in graphene‐like structures are viewed as the fourth states complementary to their zigzag, bearded, and armchair counterparts. In this work, a rod‐in‐plasma system in a honeycomb lattice with twig edge truncation under external magnetic fields and lattice scaling is studied and it is shown that twig edge states can exist in different phases of the system, such as quantum Hall (QH) phase, quantum spin Hall (QSH) phase, and insulating phase. The twig edge states in the negative permittivity background exhibit robust one‐way transmission properties immune to backscattering and thus provide a novel avenue for solving the plasma communication blackout problem. Moreover, it is demonstrated that corner and edge states can exist within the shrunken structure by modulating the on‐site potential of the twig edges. Especially, helical edge states with the unique feature of pseudospin‐momentum locking that can be excited by chiral sources are demonstrated at the twig edges. These results show that the twig edges and interface engineering can bring new opportunities for more flexible manipulation of electromagnetic waves.

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Section: Introductionmentioning

confidence: 99%

Topological States Decorated by Twig Boundary in Plasma Photonic Crystals

Li,

Yao,

Wang

et al. 2024

Advanced Optical Materials

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Topologically Protected Parametric Wavelength Conversion in a Valley Hall Insulator

Sohn,

Choi,

Chen

et al. 2024

Laser & Photonics Reviews

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Nonlinear phenomena are investigated in a topological photonic valley Hall insulator (VHI) using a Kagome system designed to have localized topological boundary state (TBS) at telecommunications wavelengths. Valley Hall topologically protected nonlinear phenomena are demonstrated. Similar transmission properties and parametric wavelength conversion of up to −12 dB are experimentally achieved using sub‐milliwatt average powers in a zigzag interface without back‐scattering, compared with a straight interface. Furthermore, a 7 dB slow light enhancement is observed in the conversion efficiency near the red edge in the transmission band of the boundary state, demonstrating how slow light‐induced backscattering may be circumvented by leveraging the topologically protected boundary state. A Kerr‐induced delocalization of the valley Hall topological state (VHTS) is further experimentally observed, which can be harnessed to control the properties of topological edge states.

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Coexistence of Fano and electromagnetically induced transparency resonance line shapes in photonic topological insulators

Liu

et al. 2023

Chaos, Solitons & Fractals

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Valley Hall edge solitons in honeycomb lattice with an armchair-type domain wall

Cited by 4 publications

References 74 publications

Topological States Decorated by Twig Boundary in Plasma Photonic Crystals

Topological States Decorated by Twig Boundary in Plasma Photonic Crystals

Topologically Protected Parametric Wavelength Conversion in a Valley Hall Insulator

Coexistence of Fano and electromagnetically induced transparency resonance line shapes in photonic topological insulators

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