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In-Depth Information
can result in a phase shift with respect to the position of maximum com-
pression and dilation of the monolayer on the wave surface. For this rea-
son, the experiments reported here employed a standing wave field (or
nearly so) in an attempt to simplify the experiment by eliminating or
minimising any phase shift so that maximum compress and dilation should
occur (according to theory) at the wave crest and trough, respectively.
Applications of this nonlinear laser imaging technique holds the promise
of directly studying the effect that capillary wave stresses exert upon the
surfactant layer as well as those exerted by the surfactant on the water sur-
face. The importance of capillary wave/surfactant dynamics at the ocean
underscores the importance of these experiments and suggests that further
efforts directed toward extending these experimental techniques to
in situ
ocean studies would be most useful.
Acknowledgements.
The authors would like to acknowledge support from
the Office of Naval Research (N000149710707 and N000149611071) and
the Naval Research Laboratory.
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