Negative index metamaterial through multi-wave interactions: numerical proof of the concept of low-frequency Lamb-wave multiplexing

Lott, Martin; Roux, Philippe; Rupin, Matthieu; Colquitt, Daniel; Colombi, Andrea

doi:10.1038/s41598-020-79572-9

Cited by 9 publications

(6 citation statements)

References 24 publications

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“…A rough estimation with azimuthal averaging of the radiation circles highlights a decrease in the wavenumber over a 60 Hz frequency bandwidth. We estimate around -3.3 m/s at 2150 Hz the group velocity, which is in the same order of magnitude ($-2 m/s) as recently publish numerical simulation on a similar setup (Lott et al, 2021). The fluctuations on the radiation circle in the measurement in Fig.…”

Section: Leakage At Flexural Resonances and Negative Index Materialssupporting

confidence: 76%

“…6, panel 3, a-c, suggests a large attenuation effect in the plate wave propagation. Recent numerical studies have shown that the transmission of energy through the flexural resonance motion is highly sensitive to small amounts of disorder in the beams positions (Lott et al, 2021). We conclude that the loss is due to strong scattering effects coming from the imperfect position of the beams in our experimental realization of the square lattice metasurface, and not to intrinsic damping properties of the material.…”

Section: Leakage At Flexural Resonances and Negative Index Materialsmentioning

confidence: 58%

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Random versus regular square lattice experimental comparison for a subwavelength resonant metasurface

Lott

Roux

2021

The Journal of the Acoustical Society of America

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An experimental comparison is reported here between two equivalent resonant subwavelength metasurfaces made of long aluminum beams glued closely together on a thin aluminum plate. One metasurface has a random distribution of the resonator beams, and the other has a regular square lattice of pitch 1.5 cm. The random lattice shows the “resonant” behavior of a typical metasurface, with a wide full bandgap for the first A0 Lamb mode. Instead, the regular square lattice combines Fano resonance with Bragg scattering at the edges of the passband, thus creating anisotropy and a pseudo bandgap. Comparisons with numerical simulations are performed, with good agreement with the experimental data. The multimodal response of the beams is also responsible for double negativity in a narrow frequency band, and the event of a pseudo bandgap around this same flexural resonance. In addition, the scattering regimes for both the random and regular metasurfaces are characterized using coherent and incoherent signal analysis.

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Section: Leakage At Flexural Resonances and Negative Index Materialssupporting

confidence: 76%

Section: Leakage At Flexural Resonances and Negative Index Materialsmentioning

confidence: 58%

Random versus regular square lattice experimental comparison for a subwavelength resonant metasurface

Lott

Roux

2021

The Journal of the Acoustical Society of America

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“…In Ref. 26 , there is a negative index metamaterial made up of extended beams enclosed to a plate. A 3 dimensions acoustic MTM is examined in Ref.…”

Section: Introductionmentioning

confidence: 99%

Massive metamaterial system-loaded MIMO antenna array for 5G base stations

Al‐Bawri

Islam

et al. 2022

Sci Rep

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An integrated massive multiple-input multiple-output (mMIMO) antenna system loaded with metamaterial (MTM) is proposed in this article for fifth-generation (5G) applications. Besides, achievement of duple negative (DNG) characteristics using a proposed compact complementary split-ring resonator (SRR), a broad epsilon negative metamaterial (ENG) with more than 1 GHz bandwidth (BW), and near-zero refractive index (NZRI) features are presented. The proposed mMIMO antenna consists of eight subarrays with three layers that operate in the 5G mind band at 3.5 GHz (3.40–3.65 GHz) with high port isolation between adjacent antenna elements compared to an antenna that does not use MTM. Each subarray has two patches on the top layer, while the middle and bottom layers have two categories of full and partial ground plans, respectively. Simulated, produced, and tested are 32 elements with a total volume of 184 × 340 × 1.575 mm3. The measured findings reveal that the sub-6 antenna has a better than 10 dB reflection coefficient (S11), a lower than 35 dB isolation, and a peak gain of 10.6 dBi for each subarray. Furthermore, the recommended antenna loaded with MTM has demonstrated good MIMO performance with an ECC of less than 0.0001, total efficiencies of more than 90%, more than 300 MHz bandwidth, and an overall gain of 19.5 dBi.

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“…Recently, using a sub-wavelength array of beams attached to the plate, Lott [17] created a narrow transmission bands at the flexural resonances of the beams inside the wide frequency bandgap. A metamaterial terahertz biosensor, which has two resonant absorption frequencies, was represented by Li [18] for fast and label-free identification of early-stage cervical cancerous tissues.…”

Section: Introductionmentioning

confidence: 99%

Analytical analysis of nonlinear internal resonance bandgap of pendulum-type metamaterial

Guo

Chen

Zhang

2022

Int. J. Mod. Phys. B

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In this paper, a pendulum-type metamaterial (PTM) is designed with a pendulum bob hinged at the primary mass. Considering the effect of geometric nonlinearity, the nonlinear dynamic equations of PTM unit cell are presented with the aid of the Bloch theorem. The analytical formula of dispersion equation is deduced to discuss the nonlinear internal resonance bandgap using the harmonic balance method. The obtained bandgap of the metamaterial is in good agreement with the numerical simulation result. The nonlinear geometric influence of pendulum on PTM bandwidth is significant. The bandgaps under different internal resonances are substantially different from each other due to the nonlinear effects. The upper boundaries of the frequency bandgap under 1:1/2 and 1:1/3 internal resonance rise nonlinearly to higher than those under linear and 1:1 internal resonance conditions. It shows that the impact of 1:1/2 and 1:1/3 internal resonance on the bandgap could be more obvious as the strong nonlinearity is taken into consideration.

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Negative index metamaterial through multi-wave interactions: numerical proof of the concept of low-frequency Lamb-wave multiplexing

Cited by 9 publications

References 24 publications

Random versus regular square lattice experimental comparison for a subwavelength resonant metasurface

Random versus regular square lattice experimental comparison for a subwavelength resonant metasurface

Massive metamaterial system-loaded MIMO antenna array for 5G base stations

Analytical analysis of nonlinear internal resonance bandgap of pendulum-type metamaterial

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