Acoustic one-way mode conversion and transmission by sonic crystal waveguides

Abstract

We proposed a scheme to achieve one-way acoustic propagation and even odd mode switching in two mutually perpendicular sonic crystal waveguides connected by a resonant cavity. The even mode in the entrance waveguide is able to switch to odd mode in the exit waveguide through a symmetry match between the cavity resonant modes and the waveguide modes. Conversely, the odd mode in the exit waveguide is unable to be converted into the even mode in the entrance waveguide as incident waves and eigenmodes are mismatched in their symmetries at the waveguide exit. This one way mechanism can be applied to design an acoustic diode for acoustic integration devices and can be used as a convertor of the acoustic waveguide modes.

arXiv comment14 pages, 5 figures

References in corpus (9)

• Reciprocity in reflection and transmission: what is a "phonon diode"?
• Subwavelength edge detection through trapped resonances in waveguides
• Asymmetric acoustic propagation of wave packets via the self-demodulation effect
• One-way Phonon Isolation In Acoustic Waveguides
• Graded negative index lens with designable focal length by phononic crystal
• Acoustic guiding and subwavelength imaging with sharp bending by sonic crystal
• Splitting of self-collimated beams in two-dimensional sonic crystals
• Highly asymmetric interaction forces induced by acoustic waves in coupled plate structures
• Designable hybrid sonic crystals for transportation and division of acoustic images