Microscopy from Scientific Research

Shape modes with angular wavenumbers l ranging from 1 to 6. The top panels display the bright-field snapshots from two consecutive ultrasound cycles, at a generic time instant t = t i and one ultrasound (US) period T US = 1 s later, at t = t i + T US . These images illustrate the cyclic transition between a geometric pattern and its dual during the shape mode oscillation. Odd-wavenumber shape mode patterns are self-dual. The red dashed sketches show the polyhedral representation of shape mode patterns. The bottom panels show the combination of spherical harmonics {Y}_{l}^{m} representing the shape mode patterns. The red regions denote outward deformation, whereas the blue regions indicate inward deformation.

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