Directional acoustic source based on the resonant cavity of two-dimensional phononic crystals
- 26 May 2005
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 86 (22), 224105
- https://doi.org/10.1063/1.1942642
Abstract
We report a design of a highly-directional acoustic source, formed by placing a line acoustic source inside a planar cavity of two-dimensional phononic crystals. Radiation field with a half-power angular width of less than 6° is obtained. The operating frequency of the directional acoustic source can be extended to any required value within the full bandgap by adjusting the separation of the cavity.Keywords
This publication has 25 references indexed in Scilit:
- Negative refraction of acoustic waves in two-dimensional phononic crystalsApplied Physics Letters, 2004
- Highly directive radiation from sources embedded inside photonic crystalsApplied Physics Letters, 2003
- Photonic-crystal 180° power splitter based on coupled-cavity waveguidesApplied Physics Letters, 2003
- Localized states of acoustic waves in three-dimensional periodic composites with point defectsZeitschrift für Physik B Condensed Matter, 2003
- Enhanced emission with angular confinement from photonic crystalsApplied Physics Letters, 2002
- Experimental and Theoretical Evidence for the Existence of Absolute Acoustic Band Gaps in Two-Dimensional Solid Phononic CrystalsPhysical Review Letters, 2001
- Waveguiding in planar photonic crystalsApplied Physics Letters, 2000
- Phononic crystals with planar defectsPhysical Review B, 2000
- Theory of acoustic band structure of periodic elastic compositesPhysical Review B, 1994
- Existence of a photonic gap in periodic dielectric structuresPhysical Review Letters, 1990