Double Frequency Filtering in One Dimensional Comb-Like Phononic Structure Containing a Segment Defect

Kadmiri, Ilyass El; Ben-Ali, Youssef; Ouariach, Abdelaziz; Khaled, Aissam; Bria, Driss

doi:10.1007/978-3-030-62199-5_2

Cited by 5 publications

(1 citation statement)

References 24 publications

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“…By constructing channels with identical building blocks, yet different boundary potentials, we can demultiplex infrasound waves based on their frequencies. There exist multiple theoretical proposals for realizing phonon demultiplexers (Pennec et al, 2004;Hussein et al, 2005;Pennec et al, 2005;Vasseur et al, 2011;Rostami-Dogolsara et al, 2016;Zou et al, 2017;Moradi and Bahrami, 2019;Babaki and Nazari, 2020;Ben-Ali et al, 2020;Gharibi and Bahrami, 2020;Motaei and Bahrami, 2020) with few experimental demonstrations (Mohammadi and Adibi, 2011;Faiz et al, 2020;Bilal et al, 2020). However, demultiplexing infrasound phonons has not been observed.…”

Section: Introductionmentioning

confidence: 99%

Demultiplexing Infrasound Phonons With Tunable Magnetic Lattices

Watkins

Bilal

2020

Front. Mater.

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Controlling infrasound signals is crucial to many processes ranging from predicting atmospheric events and seismic activities to sensing nuclear detonations. These waves can be manipulated through phononic crystals and acoustic metamaterials. However, at such ultra-low frequencies, the size (usually on the order of meters) and the mass (usually on the order of many kilograms) of these materials can hinder its potential applications in the infrasonic domain. Here, we utilize tunable lattices of repelling magnets to guide and sort infrasound waves into different channels based on their frequencies. We construct our lattices by confining meta-atoms (free-floating macroscopic disks with embedded magnets) within a magnetic boundary. By changing the confining boundary, we control the meta-atoms’ spacing and therefore the intensity of their coupling potentials and wave propagation characteristics. As a demonstration of principle, we present the first experimental realization of an infrasound phonon demultiplexer (i.e., guiding ultra-low frequency waves into different channels based on their frequencies). The realized platform can be utilized to manipulate ultra-low frequency waves, within a relatively small volume, while utilizing negligible mass. In addition, the self-assembly nature of the meta-atoms can be key in creating re-programmable materials with exceptional nonlinear properties.

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