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Mathematics > Analysis of PDEs

arXiv:1804.00756 (math)
[Submitted on 2 Apr 2018 (v1), last revised 8 Mar 2019 (this version, v2)]

Title:Subwavelength localized modes for acoustic waves in bubbly crystals with a defect

Authors:Habib Ammari, Brian Fitzpatrick, Erik Orvehed Hiltunen, Sanghyeon Yu
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Abstract:The ability to control wave propagation is of fundamental interest in many areas of physics. Photonic and phononic crystals have proved very useful for this purpose but, because they are based on Bragg interference, these artificial media require structures with large dimensions. In [Ammari et al., Subwavelength phononic bandgap opening in bubbly media, J. Diff. Eq., 263 (2017), 5610--5629], it has been proved that a subwavelength bandgap opening occurs in bubbly phononic crystals. To demonstrate the opening of a subwavelength phononic bandgap, a periodic arrangement of bubbles is considered and their subwavelength Minnaert resonance is exploited. In this paper, this subwavelength bandgap is used to demonstrate cavities, very similar to those obtained in photonic and phononic crystals, albeit of deeply subwavelength dimensions. The key idea is to perturb the size of a single bubble inside the crystal, thus creating a defect. The goal is then to analytically and numerically show that this crystal has a localized eigenmode close to the defect bubble.
Comments: 19 pages, 4 figures, typos corrected, added argument to account for dilute regime
Subjects: Analysis of PDEs (math.AP)
MSC classes: 35R30, 35C20
Cite as: arXiv:1804.00756 [math.AP]
  (or arXiv:1804.00756v2 [math.AP] for this version)
  https://doi.org/10.48550/arXiv.1804.00756
Journal reference: SIAM J. Appl. Math., 78(6), 3316-3335, 2018
Related DOI: https://doi.org/10.1137/18M1178748

Submission history

From: Erik Orvehed Hiltunen [view email]
[v1] Mon, 2 Apr 2018 23:11:01 UTC (42 KB)
[v2] Fri, 8 Mar 2019 09:40:19 UTC (86 KB)
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