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Phys Rev E Stat Nonlin Soft Matter Phys. 2007 Nov;76(5 Pt 2):056605. Epub 2007 Nov 12.

Acoustic Bloch oscillations in a two-dimensional phononic crystal.

Author information

1
Key Lab of Acoustic and Photonic Materials and Devices of Ministry of Education and Department of Physics, Wuhan University, Wuhan 430072, China.

Abstract

We report the observation of acoustic Bloch oscillations at megahertz frequency in a two-dimensional phononic crystal. By creating periodically arrayed cavities with a decreasing gradient in width along one direction in the phononic crystal, acoustic Wannier-Stark ladders are created in the frequency domain. The oscillatory motion of an incident Gaussian pulse inside the sample is demonstrated by both simulation and experiment.

PMID:
18233780
DOI:
10.1103/PhysRevE.76.056605

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