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Applied Optics

Applied Optics


  • Vol. 40, Iss. 24 — Aug. 20, 2001
  • pp: 4134–4139

Capillary waves on an asymmetric liquid film of pentane on water

Denis Fenistein, Gerard H. Wegdam, William V. Meyer, and J. Adin Mann, Jr.  »View Author Affiliations

Applied Optics, Vol. 40, Issue 24, pp. 4134-4139 (2001)

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Surface light-scattering measurements have been carried out on thin asymmetric films of pentane on water. We vary the film thickness ℓ over a wide range (10-9 m < ℓ < 10-5 m). Compared with the ripplons wavelength 1/q, thick films of pentane (ℓ ≫ 1/q) display the same power spectrum as a pure pentane–vapor interface: a single peak. When thinning the film down to ℓ ≈ 1/q, hydrodynamic coupling between the layers of the interface is revealed by the appearance of a second peak beside the first one. We describe the thickness dependence of the two coupled modes through variations of the positions, the widths, and the amplitudes of both peaks.

© 2001 Optical Society of America

OCIS Codes
(240.0240) Optics at surfaces : Optics at surfaces
(310.0310) Thin films : Thin films

Original Manuscript: December 8, 2000
Revised Manuscript: April 23, 2001
Published: August 20, 2001

Denis Fenistein, Gerard H. Wegdam, William V. Meyer, and J. Adin Mann, "Capillary waves on an asymmetric liquid film of pentane on water," Appl. Opt. 40, 4134-4139 (2001)

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