Acoustic Bloch oscillations in a two-dimensional phononic crystal
Physical Review E—Statistical, Nonlinear, and Soft Matter Physics, 2007•APS
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.
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.
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.
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