期刊
PHYSICAL REVIEW LETTERS
卷 94, 期 16, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.94.166102
关键词
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Free fluctuations of the contact line of large drops (puddles) of wavelength lambda >kappa(-1), the capillary length, cannot be seen on a solid substrate because even a small but finite hysteresis is enough to block these slow modes. We show here that vertical vibrations of the substrate (at frequency omega(E), acceleration Lambda) above a threshold amplitude Lambda(c) release the line and excite contour oscillations (triplons). We observe harmonic modes and parametric excitations at omega(E)/2. We construct the phase diagram (Lambda,omega(E)) of these subharmonic modes and we study their growth dynamics: they slow down near the threshold of the contour instability.
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