Subwavelength guided modes for acoustic waves in bubbly crystals with a line defect
Autor: | Habib Ammari, Sanghyeon Yu, Erik Orvehed Hiltunen |
---|---|
Rok vydání: | 2021 |
Předmět: |
35R30
35C20 Wave propagation business.industry Band gap Applied Mathematics General Mathematics Physics::Optics Acoustic wave law.invention Resonator Mathematics - Analysis of PDEs Optics law FOS: Mathematics Photonics business Multipole expansion Waveguide Analysis of PDEs (math.AP) Mathematics Line (formation) |
Zdroj: | Journal of the European Mathematical Society. 24:2279-2313 |
ISSN: | 1435-9855 |
Popis: | The recent development of subwavelength photonic and phononic crystals shows the possibility of controlling wave propagation at deep subwavelength scales. Subwavelength bandgap phononic crystals are typically created using a periodic arrangement of subwavelength resonators, in our case small gas bubbles in a liquid. In this work, a waveguide is created by modifying the sizes of the bubbles along a line in a dilute two-dimensional bubbly crystal, thereby creating a line defect. Our aim is to prove that the line defect indeed acts as a waveguide; waves of certain frequencies will be localized to, and guided along, the line defect. The key result is an original formula for the frequencies of the defect modes. Moreover, these frequencies are numerically computed using the multipole method, which numerically illustrates our main results. 24 pages, 5 figures |
Databáze: | OpenAIRE |
Externí odkaz: |