1 research outputs found
Non-Linear Deformations of Liquid-Liquid Interfaces Induced by Electromagnetic Radiation Pressure
The idea of working with a near-critical phase-separated liquid mixture
whereby the surface tension becomes weak, has recently made the field of laser
manipulation of liquid interfaces a much more convenient tool in practice. The
deformation of interfaces may become as large as several tenths of micrometers,
even with the use of conventional laser power. This circumstance necessitates
the use of nonlinear geometrical theory for the description of surface
deformations. The present paper works out such a theory, for the surface
deformation under conditions of axial symmetry and stationarity. Good agreement
is found with the experimental results of Casner and Delville [A. Casner and J.
P. Delville, Phys. Rev. Lett. {\bf 87}, 054503 (2001); Opt. Lett. {\bf 26},
1418 (2001); Phys. Rev. Lett. {\bf 90}, 144503 (2003)], in the case of moderate
power or a broad laser beam. In the case of large power and a narrow beam,
corresponding to surface deformations of about 50 micrometers or higher, the
theory is found to over-predict the deformation. Possible explanations of this
discrepancy are discussed.Comment: RevTeX4, 19 pages, 4 figures. Sec. IIIB rewritten, 4 new references.
To appear in Phys. Rev.