Tuning of topological interface modes in an elastic beam array system with inerters

Cajić, Milan; Christensen, Johan; Adhikari, Sondipon

doi:10.1016/j.ijmecsci.2021.106573

Cited by 21 publications

(3 citation statements)

References 72 publications

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“…The dynamic mass-amplifying effect of inerters was applied in [33] to investigate longitudinal elastic wave propagation characteristics of acoustic metamaterials with different inerter configurations. Inerters were also used in acoustic metamaterials to demonstrate bandgap widening via inertial amplification effect [34], seismic wave attenuation [35] or tuning of interface modes in elastic beam systems [36]. Topological interface states based on sub-wavelength in-plane waves were also studied in elastic metamaterials with translational resonators [20].…”

Section: Introductionmentioning

confidence: 99%

Tunable topological interface states in one-dimensional inerter-based locally resonant lattices with damping

Cajić

Karličić²,

Christensen

et al. 2023

Journal of Sound and Vibration

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Section: Introductionmentioning

confidence: 99%

Tunable topological interface states in one-dimensional inerter-based locally resonant lattices with damping

Cajić

Karličić²,

Christensen

et al. 2023

Journal of Sound and Vibration

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“…Therefore, the dynamically tunable topological TPC structures are highly desirable to realize reconfigurable, self-adaptive, and multi-functional photonic devices. Although dynamic tunability has been proposed in 1D and 2D TPC structures based on thermal tuning [26], mechanical tuning [27], optical tuning [28][29][30] as well as electrical tuning [31] for acoustic, terahertz, and communication wavelengths, it is still challenging to achieve amplitude tunable topological photonic devices especially when the devices are composed of metal rods. Therefore, in this work, we experimentally demonstrate a technique of dynamic tunability of EM wave propagation through a TPC structure that would be useful to realize modulators, beam splitters, and many other photonic devices in the microwave regime.…”

Section: Introductionmentioning

confidence: 99%

Topological edge state assisted dynamically tunable microwave propagations in photonic crystals

Jana,

Devi,

Kulkarni

et al. 2023

New J. Phys.

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Topological photonics has emerged as a cutting-edge and intriguing field that permits electromagnetic waves to transmit with minimal losses even when they come in contact with sharp turns or imperfections or defects. In this study, we validate a strategy to realize dynamically amplitude tunable light propagation in a topological waveguide based on a three-dimensional printed valley Hall photonic crystal structure operating in the microwave frequency region. Here, tunable light propagation is facilitated by inserting an active defect in the form of a semiconductor (silicon) material slab across the domain boundary of the topological waveguide. In this configuration, dynamic variation of transmission amplitude is realized via photoexcitation of the semiconductor defect using an external laser of wavelength, λ ∼ 510 nm. This results in active amplitude tunability of ∼ − 10 dB in topological wave propagation under a photoexcitation of 100 mW. Our demonstrated route can lead to the design of dynamically controlled topological photonic devices such as optical modulators, switches, optical buffers, etc which are important for the development of 6G communication systems.

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“…Many novel PnC structures have been proposed and used in attempts to actively control vibration and noise. [10][11][12][13][14][15][16] There are also many studies on energy harvesting using the properties of PnCs combined with the piezoelectric effect, and remarkable results have been achieved. [17][18][19][20] Gonella et al 21) introduced a multifunctional structural design of a hexagonal truss-core honeycomb, which combines superior mechanical filtering performance and energy harvesting capabilities.…”

Section: Introductionmentioning

confidence: 99%

Designing a phononic crystal with a large defect to enhance elastic wave energy localization and harvesting

Yang¹,

Zhong²,

Xiang³

2022

Jpn. J. Appl. Phys.

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Phononic crystal (PnC) has been proved for its manipulation and amplification of elastic waves. Using this characteristic of PnC to assist energy harvesting has remarkable effect. Generally, defect occurs when unit cell in PnC is replaced by another cell with different geometric or material properties, the output electric power of piezoelectric energy harvesting (PEH) devices will be significantly enhanced. In this study, a cross hole-type PnC-assisted PEH device with a large-size defect is presented by replacing several adjacent multiple cells with other cells. It is found that multiple peak voltages can be created within BG and multimodal energy harvesting can be performed. Compared with the defect mode composed of a small-size defect, energy localization and amplification of the proposed PnC leads to substantially enhancement of harvesting power after tailoring geometric parameters of a PEH device. This work will be expected to design PnC-assisted PEH devices in a reasonable way.

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Tuning of topological interface modes in an elastic beam array system with inerters

Cited by 21 publications

References 72 publications

Tunable topological interface states in one-dimensional inerter-based locally resonant lattices with damping

Tunable topological interface states in one-dimensional inerter-based locally resonant lattices with damping

Topological edge state assisted dynamically tunable microwave propagations in photonic crystals

Designing a phononic crystal with a large defect to enhance elastic wave energy localization and harvesting

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