Some remarks on propagation characteristics of ridge guides for acoustic surface waves at low frequencies

1974 ◽  
Vol 56 (1) ◽  
pp. 16-18 ◽  
Author(s):  
B. K. Sinha
Keyword(s):  
Surface Waves ◽  
Propagation Characteristics ◽  
Low Frequencies ◽  
Acoustic Surface Waves

Dust acoustic surface waves on a dusty plasma slab

2000 ◽  
Vol 7 (6) ◽  
pp. 2731-2732 ◽  
Author(s):  
L. Stenflo ◽  
P. K. Shukla ◽  
M. Y. Yu
Keyword(s):  
Surface Waves ◽  
Dusty Plasma ◽  
Dust Acoustic ◽  
Plasma Slab ◽  
Acoustic Surface Waves

Analysis of propagation in ridge guides for acoustic surface waves

1972 ◽  
Vol 8 (4) ◽  
pp. 82 ◽  
Author(s):  
P.E. Lagasse ◽  
I.M. Mason
Keyword(s):  
Surface Waves ◽  
Acoustic Surface Waves

Nonlinear TE surface waves in a ferrite slab bounded by Kerr-type metamaterials

2017 ◽  
Vol 26 (03) ◽  
pp. 1750028 ◽  
Author(s):  
Burhan Zamir ◽  
Rashid Ali
Keyword(s):  
Boundary Conditions ◽  
Surface Waves ◽  
Transverse Electric ◽  
Dispersion Relations ◽  
Double Negative ◽  
Propagation Characteristics ◽  
Special Cases ◽  
Tangential Field ◽  
Effective Wave ◽  
Ferrite Slab

In this paper, nonlinear transverse electric surface waves in a structure consisting of a ferrite slab sandwiched between a Kerr-type double-negative metamaterial (DNG-MTM) have been investigated. In addition to a DNG-MTM, two special cases with nonlinear single-negative metamaterials (SNG-MTMs) have also been discussed. The dispersion relations are obtained by applying the boundary conditions to the tangential field components of each layer. The propagation characteristics are plotted numerically for the effective wave index versus propagation frequency.

scholarly journals Demultiplexing Infrasound Phonons With Tunable Magnetic Lattices

2020 ◽  
Vol 7 ◽  
Author(s):  
Audrey A. Watkins ◽  
Osama R. Bilal
Keyword(s):  
Self Assembly ◽  
Small Volume ◽  
Low Frequency ◽  
Acoustic Metamaterials ◽  
Propagation Characteristics ◽  
Low Frequencies ◽  
Experimental Realization ◽  
Nonlinear Properties ◽  
Potential Applications ◽  
Low Frequency Waves

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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