Nanometer-resolved collective micromeniscus oscillations through optical diffraction

H. Rathgen, K. Sugiyama, C.D. Ohl, Detlef Lohse, Friedrich Gunther Mugele

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We study the dynamics of periodic arrays of micrometer-sized liquid-gas menisci formed at superhydrophobic surfaces immersed into water. By measuring the intensity of optical diffraction peaks in real time, we are able to resolve nanometer-scale oscillations of the menisci with submicrosecond time resolution. Upon driving the system with an ultrasound field at variable frequency, we observe a pronounced resonance at a few hundred kilohertz, depending on the exact geometry. By modeling the system using the unsteady Stokes equation, we find that this low resonance frequency is caused by a collective mode of the acoustically coupled oscillating menisci.
Original languageUndefined
Article number214501
Pages (from-to)-
JournalPhysical review letters
Issue number21
Publication statusPublished - 2007


  • IR-58275
  • METIS-242609

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